Functions Revision | Question 5 | Mathematics | DBE 2021 | Mlungisi Nkosi

Past exam walk-through of the DBE May/June 2021 Exam
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#grade12 #matric #mlungisinkosi

[@mothupimohlapamaswi6866]

You are the best my brother, through you my maths is improving. I'm 33 years of age and I wrote my matric in 2010, now in 2024 I'm rewriting.

[@Millicent-n2o]

Good luck, I'm 31 re writing on friday

[@mothupimohlapamaswi6866]

@@Millicent-n2o all the best of luck ntwana on your exam on Friday, please please please do not panic.we are 1 hundred percent behind you nd give it your best

[@lebomakgakga279]

I'm also 33, wrote my matric in 2008 and I'll be rewriting. Good luck for tomorrow guys

[@luckymusida1994]

All the best.📈

[@mothupimohlapamaswi6866]

@@lebomakgakga279 hi ngwana, I saw your message and in a nut-shell, even though I had already taken the decision to go back and re-write at the age of 33, I must say I still get inspired through one's story like yours Lebzalady. Let's prove to ourselves and our age mates out there that it is never too late, to go back to school and reclaim your destiny.

[@SamiaNkurunziza]

Math completely destroyed my confidence before but now i can take on hard topics like never before❤❤thank you

[@katlehosekete2574]

Im ready to rewrite my matric thank you sir🙌❤

[@mphoyangamuthige9485]

How did it go?

[@Eugene-t8u]

@@mphoyangamuthige9485good

[@rockychagane]

Thank you so much for this Sir I was really struggling😢Thank you again❤️🙏

[@gohardboiled.99]

This is working I got out of exam room excited because of you sir❤ thank you

[@BielGatluak-g5u]

This is amazing, follow your work God bless okay

[@donyemweni654]

Yoh Sir thank you so much I had problems with functions but you made it easy

[@MlungisiNkosi]

More will come 😊

[@Rato_N]

Hi, for 5.6 since they are saying for which values of x will y=0 ( meaning we need to determine the x intercepts). Is it not that the original equation the x=-2 and the inverse equation x=4 because we need to make y=0. Ultimately the answers will be -2 and 4 however I’m a bit puzzled as to us calculating the y intercept instead of the x intercept. May you please clarify that for me.😢 Because your original equation x=4 and the inverse x=-2

[@mokwalamakgake140]

I saw that also,it's a mistake 😅

[@mokwalamakgake140]

X=-2 for original equation and X=4 for inverse

[@relebohilechantell7902]

Thankque soo much sir for this lesson , could you please do the one of the exponential function as well as it's inverse🥺❤

[@MlungisiNkosi]

I hope you saw that

[@relebohilechantell7902]

@@MlungisiNkosi I did sir thank you so much❤❤

[@ThulaniInnocentNgcobo]

Thank you sir for striving for us

[@NtsakoHlongwane-z4q]

Thank you 😊 you're the best

[@ashbeautifulbraid3633]

5.4 it's clear thank you

[@its.me.khanyo]

Are you teaching grade 12 only

[@oratilemogamisi8388]

Hey sir, for question 5,5 could i have left the answer as x-4 over 2

[@MlungisiNkosi]

Yeah you could

[@RockyKgolane-ih7st]

You truly helped me sir.

[@MlungisiNkosi]

You’re welcome

[@VuyisileVee-df2fs]

This is amazing

[@Sky_blue326]

Greetings sir.may you plz do the corrections of North West September 2022 mathematics p1🙏.

[@DineoNtobeng-jp6no]

Range of f isn't (-infinity, 16) ?

[@MlungisiNkosi]

It is

[@amahlengubane5023]

hello sir. for 5.6 i used what the question gave me. i multiplied both g(x) and g-1(x) and equated it to zero... it gave me the same answer as yours. would it still be correct if it was another question or was i just lucky?

[@MlungisiNkosi]

Yes it would 😊

[@PalesaPreciousMashego]

I need help hle😢

[@BilashMia-i3p]

Anderson Shirley Robinson Donna Lopez Christopher

[@givenlindanamkhatshwa9282]

Sir on 5.6 wasn't supposed to be Y=4 and Y=-2 respectively 🤔

[@minenhlebukuva8083]

No, they want the values of x where y=0 of the original and the inverse graph. Read the question again❤

[@givenlindanamkhatshwa9282]

@@minenhlebukuva8083 I realized my mistakes thanks

[@khanyibalise738]

Sir please do paper 2 revision

[@MlungisiNkosi]

Next week

[@DanielAnderson-f2f]

Lee Jose Lee Lisa Clark Edward

[@karenmatewe403]

Sir I don't get it at 5.5

[@MlungisiNkosi]

What is confusing?

[@karenmatewe403]

@@MlungisiNkosi sir I don't get it when you add negative numbers there

[@samuelmidonaldson2585]

Martin Dorothy Lopez Betty Garcia Frank

[@ElvaJones-c7g]

Young Donna Robinson Dorothy Walker Ruth

[@anitamabjala531]

Why did you divide by negative 2 and not negative 1😩🥹

[@MlungisiNkosi]

Where?

[@botlhalengakane275]

​@@MlungisiNkosiit is still going to give the same answer , he is asking about where we where changing the negative on our A which is -2x² so even if he/she divided by -1 he was going to get the same answer you go since u divided everything by negative 2 but i recommend the -1 one so why did uu divide by -2 though

[@applejuice1233]

I got a test tmmr ,(I’m cooked)

[@aydenx3]

I got a prelim exam tmr I'm actually cooked 💀

[@Treaty2]

Love from Botswana ❤

[@MlungisiNkosi]

Welcome Botswana 🇧🇼

[@RaymondMercado-i9c]

Perez Jennifer Lopez William Martin William

[@samuelmidonaldson2585]

Allen Daniel Rodriguez Patricia Davis Angela

[@yoliswamazibuko1312]

Good afternoon sir I think in 5.2 the y=24 and 18 because the -2(1)^2 =4, so you forgot to square root the -2

[@MlungisiNkosi]

Thank you 😊

[@thandotyana6459]

❤Thank you sir

[@MlungisiNkosi]

You’re most welcome

[@nokuthulamakhunga7039]

Thank you

[@MlungisiNkosi]

You’re welcome

[@thobekamthethwa5588]

Thank you sir

[@MlungisiNkosi]

My pleasure

[@LipiAktar-h4q]

Young Jeffrey Jones Jessica Rodriguez Ruth

[@thobekamthethwa5588]

Thank you so much sir, I was really struggling with 5.6 and 5.7 but I understood it today. Ngiyabonga kakhulu thisha ❤️

[@MlungisiNkosi]

My pleasure 😇

[@karabomadutung8059]

I was too struggling with it know I've gathered enough i will have to just apply my knowledge bout them❤

[@karabomadutung8059]

@@MlungisiNkosi GOD BLESS YOU❤

[@VernonSims-z5n]

Davis Shirley White Larry Davis Christopher

[@SamuelAmanda-m2c]

Harris Paul White Mark Walker Joseph

[@FgfGhm-m3f]

Taylor Jose Davis David Jones Anna

[@Likhona04]

Thank you so much for this.❤️❤️

[@MlungisiNkosi]

You’re welcome

[@Pretty.lwethu]

5.5 Why did the 4 change to be -4 ,while it was not the one we were transposing?

[@givenlindanamkhatshwa9282]

No he wanted to say X-+4 which is the same as X-4 I guess it makes sense

[@nombulelokunene6258]

How to deal with this question if the equation do not meet the lowest common factor . How to treat it

[@ntandokazi]

thank you so much 🥺🥺🥺

[@MlungisiNkosi]

You’re welcome 😊

[@loopsiieyloopsiiey4654]

Where have you been😭💔and I'm only finding you last minute

[@MlungisiNkosi]

The question is where have you been? Uncle has been waiting for you all this time

[@Tee0313]

5,4 s very clear now .thank you very much

[@MlungisiNkosi]

You’re welcome

[@mbongentsholo5351]

Thank you so much sir.❤️🙏🏽

[@MlungisiNkosi]

My pleasure 😇

[@Memza]

Sir you are the Best🙏🏾

[@yalobeko7978]

Thank you for everything sir

[@MariaMapheto]

Your a star🌟 😊

[@thabanggama]

Hi sir, by Q 5.5 is it fine if i say the inverse is =x-2 as my final answer

[@KgaugeloLesufi-tz8pn]

It’s wrong dear

[@thinaslindokuhlenkolonzi6220]

Sir can u please have solve a question when the ask you to show that f(x)is equal to a certain equation because I'm still struggling with that

[@MlungisiNkosi]

Give me an example please

[@thinaslindokuhlenkolonzi6220]

They give you a cubic graphy and they say h(x)=ax³+bx² and they give you two other points Then they ask you to show that a=-1 and b=6 i hope you will understand sir

[@NonhlanhlaMakhanya-ho4kd]

Hey sir i don't understand 5.6

[@givenlindanamkhatshwa9282]

Malume said that at the x -intercept is equal to Zero for the original graph then substitute Zero where there's X in both the g(x) and the inverse of g(x) where g(x) y is 4 and inverse g(x) y is -2.

[@carltontee6798]

B^2-4ac is the best approach

[@MlungisiNkosi]

You’re welcome 😇

[@mildredagu8028]

Thank you sir ❤️

[@MlungisiNkosi]

You’re welcome

[@carltontee6798]

Thank you!!!!

[@MlungisiNkosi]

You’re welcome

[@bonoloslims4798]

sir i don't understand 5.6💔

[@MlungisiNkosi]

What don’t you understand about it

[@snqobilesphumelele1740]

Same

[@snqobilesphumelele1740]

@@MlungisiNkosi I didn't understand the way you explained it to me it made no sense didn't know what we were looking for

[@pholishongwe3944]

I also didn't understand there

[@FeliciaModise]

Thanks sir this really helped me a lot❤️😊I think I'm ready to rewrite my matric

[@ngwakoterrence4857]

I think this will do sir please add me in your group chat in

[@NjabuloRadebe-e4h]

Daniel.malume I'm about to subscribe now now

[@MlungisiNkosi]

That’s awesome

[@Suckaniggadickeveryday]

nice lesson there my favourite malume

[@MlungisiNkosi]

Thank you