CSEC Maths - A Function and its Inverse

[@pollyannhamilton5258]

This is the best tutor online. With him I know I'll surely pass my exam this year♥️♥️♥️

[@brittanyharriott6707]

Hello good day, how did you get 43/3 please? because my calculator is giving me a different figure? Thank you

[@petalarcher4812]

thank you so much, this is very helpful since the last 3 cxc maths paper I did asked to kind the inverse of given functions....

[@CSECMathematics]

+Petal Archer So if it comes tomorrow you should get it correct.... Good luck

[@robyn_murray-z3e]

@CSEC Maths can you give me the link to the other video you said you had on functions and relations

[@nikitajulien5409]

Can u do a video on vectors and matrices please

[@charismamitchell9384]

Hi can you explain how to express quadratic functions in the form a(x+h) squared +h where a, h and K are constants please thanks

[@CSECMathematics]

What I usually do is expand what is given. So a(x+h)^2 + h = a(x^2 + 2hx + h^2) + h = ax^2 + 2ahx + ah^2 + h Now if they tell you the quadratic equation is 3x^2 + 5x + 1, we can equate the coefficients of the two expressions. a = 3 2ah = 5 (then solve for h) ah^2 + h = 1. It's difficult for me to explain in the reply. You can check my playlist. There should be an example somewhere there.

[@ownitervi241]

Wait what

[@mentallygone1868]

Im confused shouldn’t 2x+1 be = to 3x at 4:50 in the video?

[@vanessacardinal4190]

I'm so not ready 😧

[@raspberry7197]

its so long now but how did u do

[@jahvygrafix9373]

@@raspberry7197 lmao

[@charismamitchell9384]

Hello Mr David I Was Just Looking At Your Video Based On Fuctions And I Came Across A Question But I Am Not Sure If I Have To Cross Multiply. The function of f(x) is 5(x)-4 over 3 and it says to write an expression in terms of x for f inverse of x can you explain please

[@CSECMathematics]

Let y = 5x -4/3 Interchange x and y x = 5y-4/3 Cross multiply 3x = 5y - 4 5y-4 = 3x 5y = 3x + 4 y = 3x + 4/5

[@desiwidthalocs]

thank you so so so sos os sossossosoossoossoso much

[@adaiahlord8064]

I feel like I'm not ready :'(

[@catcat4851]

how did u do?

[@theyoungone5034]

@@catcat4851 she got a v 💀💀

[@ownitervi241]

@@theyoungone5034 seriously?

[@theyoungone5034]

@@ownitervi241 lol idk, I'm guessing

[@rajagraham4851]

Thanks for the video but I thought u were moving a little too fast tho

[@perfectlycreated4191]

Raja Graham that's why its a video you can hit pause or replay at any time...

[@Jayyyy219]

Thank You Thank You Thank You🙏🏽😩

[@CSECMathematics]

No scene....just share so others can benefit.

[@shianntrouchen6120]

How you solve to get 43/3

[@lovietango4642]

Thank you sir

[@cischannel3713]

Good

[@sclarke5823]

THANKS ALOT !!!!!!!!!!

[@CSECMathematics]

+Shashell Clarke No problem.

[@ayannalewis8470]

F (x) = 2×+1 f(2)=2(2)+1=4+1=5

[@ronaldoreid1686]

thank you i understand now

[@CSECMathematics]

+ronaldo reid Great. Good luck tomorrow.

[@dadrianhanniford3151]

Can you do another explaining functions

[@Im.justsayin]

How did you get 43/3? I don’t understand

[@thorockoOfficialfortnite]

ah think it supposed to be 34/3...but he put 43 by mistake

[@jolenekhan4.191]

@@thorockoOfficialfortnite There's no error after you have the 34/3 you have to add the 3..so 34/3+3/1 when you add these fractions you would get the lcm as 3...3 divided by 3 is 1 so you multiply the top by 1..for the second fraction... 3 divided by 1 is 3 so you multiply the top by 3.. the two top numbers would be 34+9=43/3

[@thorockoOfficialfortnite]

@@jolenekhan4.191 ohh ok thxsss

[@tantanwilson6183]

How did he get the 34/3

[@raspberry7197]

that is the fraction for 14.3....which is what you would've gotten if u had put it in a calculator

[@ayannalewis8470]

f(-1)=2(-1)+1=-2+1=-1

[@brynx24]

feel mi can watch this less than 12 hours before the exam and pass?? if u nuh blv ina me sym

[@niekstv]

😂😂suh mi feel rn

[@brynx24]

@@niekstv yh mn, so e guh fr 😅

[@RobinsonMakayliq]

So me feel rn

[@ayannalewis8470]

afternoon sir

[@rockiidan2100]

How do you get 2x+2?

[@CSECMathematics]

(6x + 6)/3 = 2x + 2 You are dividing each term by 3, 6x/3 + 6/3 = 2x + 2