3x to the (3/4) power - 6 = 0, Many don’t know where to start…

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TabletClass Math

TabletClass Math

5 ай бұрын

How to solve an equation with rational exponents.
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Пікірлер: 53
@Call-me-Ishmael
@Call-me-Ishmael 5 ай бұрын
Love all these people saying the did it in 30s…It’s not FOR YOU. It’s for people learning it for the first time and it is remarkably well explained.🎉
@MargaretCutt-um8iq
@MargaretCutt-um8iq 4 ай бұрын
I think the point is, a lot of this stuff isn't being taught anymore. As is the case for a lot of other things not being taught anymire...
@vanessawelles4760
@vanessawelles4760 9 күн бұрын
Lot easier just to see that if 3x^3/4 =6 then.... x^3/4 must = 2 then 4th power of both side equation to see the final answer..:)
@MrMousley
@MrMousley Ай бұрын
This might be completely wrong but .. 3X^3/4 - 6 = 0 means that 3X^3/4 = 6 and X^3/4 = 2 and X = 2^4/3
@robertdriscoll9859
@robertdriscoll9859 5 ай бұрын
"Many will get wrong", "Many don't know where to start". Nice encouragement you provided there John!
@danolson1467
@danolson1467 5 ай бұрын
If you did in fact get it wrong, then you won't feel so alone. And if you got it right, you can feel a little bit special.
@HedwigjeEen
@HedwigjeEen 5 ай бұрын
I'm glad I'm not at school anymore
@devonwilson5776
@devonwilson5776 5 ай бұрын
Greetings. Yes we can. The value for X that satisfies the expression is 2(2)^1/3. The given expression can be written as X^3/4=2 by dividing the entire expression by 3 and transposing the known quantity to the right hand side. Now, moving on, we will raise each side of the expression to the 4th power to get (X^3/4)^4=2^4, and X^3=16, from which it is determined that X =2(2)^1/3. Lovely.
@bigdog3628
@bigdog3628 25 күн бұрын
hi can you say that in English please?
@terry_willis
@terry_willis 5 ай бұрын
No bone today. Excellent lesson. Thanks Boss.
@ebbi19401
@ebbi19401 5 ай бұрын
Took a different approach via log: logx= 4/3log2, hence x= 2,52...
@wesleycreekmore7194
@wesleycreekmore7194 5 ай бұрын
2(2)^1/3
@KarlSnyder-jh9ic
@KarlSnyder-jh9ic 2 ай бұрын
I can raise 2 to the 4th power then take the cube root. Or I can take the cube root, then raise it to the 4th power. And get the same answer! I didn't know that.
@lurkerone7389
@lurkerone7389 3 ай бұрын
Thank you
@harrymatabal8448
@harrymatabal8448 4 ай бұрын
Cube root of 16
@russelllomando8460
@russelllomando8460 5 ай бұрын
fun. thanks for the lesson. i knew the exp was inversed, just couldn't remember the whole procedure.
@giannaleoci2328
@giannaleoci2328 5 ай бұрын
x^3/4=2 x=2^4/3
@darkst0rm2
@darkst0rm2 5 ай бұрын
Another fun one in my head, mostly thanks to your refresher in a previous video. Keep up the good work!
@pharmdiesel
@pharmdiesel 5 ай бұрын
Thanks Mr. KZbin Math man!
@DanielKurland
@DanielKurland 5 ай бұрын
Solved in my head. It's been a while but I remembered exponent rules.
@photonqopt
@photonqopt 5 ай бұрын
Unless x is supposed to be real, there are two other complex number solutions and this video doesn't cover that at all while going unnecessarily long to get the obvious / trivial real value solution.
@moonmissionpassagetototali1952
@moonmissionpassagetototali1952 4 ай бұрын
Why not show that 2^4/3 equals 2 times sqrt 2?
@leaDR356
@leaDR356 5 ай бұрын
Why do you unnecessarily make stuff hard to follow? All you need to do is x^(3/4) = 2 (x^3)^1/4 = (2^4)^(1/4) Using the power rule x^3 = 2^4 x = 2^(4/3)
@talenthunter818
@talenthunter818 5 ай бұрын
Never mind I get it. Thanks.
@johnnyllooddte3415
@johnnyllooddte3415 5 ай бұрын
2>4/3 but i dont know how to solve it from there without a calculator
@jordanfalkowski6924
@jordanfalkowski6924 5 ай бұрын
Wasnt it friday the movie when craig whistled
@justin-hurd
@justin-hurd 5 ай бұрын
I kept getting 2 (1/4) - 6 = 0 which doesn't add up, so I'm still unsure how to correctly get it to = 0 😅 I was taught to make whole numbers fractions to handle fractions, ie 3 becomes 3/1, so the result is 9/4. Then again, I barely passed math haha
@Nicoleandstuff
@Nicoleandstuff 5 ай бұрын
I think I did that? Still got 2 cube root 2. So I think good
@ashleyr3896
@ashleyr3896 5 ай бұрын
2^(4÷3)
@staggerlee6794
@staggerlee6794 5 ай бұрын
Dude, if it takes longer than 8 minutes to explain, you can safely assume I aint ever going to get it.
@samswift4921
@samswift4921 5 ай бұрын
2.6 comes very close
@harrymatabal8448
@harrymatabal8448 13 күн бұрын
How you know that. Maybe you were their maths teacher
@rodrodrigues5402
@rodrodrigues5402 5 ай бұрын
There we go again with the idea that Mahan will get this wrong. It is such a tiring opening.
@mathmandrsam
@mathmandrsam 5 ай бұрын
Yet true! Everyone named Mahan will get this wrong!
@joso5554
@joso5554 4 ай бұрын
X=2^(4/3)… so what?
@mauriziograndi1750
@mauriziograndi1750 5 ай бұрын
Good lesson, but is evident that all that manipulation is not necessary. Maths is about making difficult things understandable in an easy way, not the other way around. It seems a show up of manipulation, thing is it's not necessary here. A pupil should be shown immediately to see that x is 2, then briefly explain why, not the other way round. Although I compliment you for your manipulation skills I cannot do for the way you put it unnecessarily.
@gregorykeane2987
@gregorykeane2987 5 ай бұрын
I agree! His explanations are over-engineered
@lpslpslpslpslpslps
@lpslpslpslpslpslps 5 ай бұрын
Wut? x does not equal 2. x = cube root of 16 = 2^(4/3). If you think x = 2, your reasoning is way off.
@jamesharmon4994
@jamesharmon4994 5 ай бұрын
I got 2*cubert(2). 😅
@maxhenderson1890
@maxhenderson1890 5 ай бұрын
I assume you mean 2 * ³√2. This is also correct. If x = 2^(4/3), then we can evaluate (2^4)^(1/3) = 16^(1/3) = 2 * ³√2
@jamesharmon4994
@jamesharmon4994 5 ай бұрын
@@maxhenderson1890 I know it is, which is why I added the laughing smiley. 😃
@b213videoz
@b213videoz 5 ай бұрын
x³/⁴ = 2 x = 2⁴/³
@maxhenderson1890
@maxhenderson1890 5 ай бұрын
Solved this in 10 seconds in my head. Really doesn't need a 20 minute video.
@Christopherdpenha
@Christopherdpenha 5 ай бұрын
John suffers from verbal diarrhea VERBAL DIARRHEA, VERBAL DIARRHEA, VERBAL DIARRHEA 😢😢😢😢😢😢😢😢😢😢THE
@jackcrouch1285
@jackcrouch1285 Ай бұрын
Dont invade peoples integers
@user-vz6ff9vw6l
@user-vz6ff9vw6l 5 ай бұрын
Qitth westt chemrew yantex we need more and more anmore x yanten righthn allah bmayshr beshta ylkefat aza
@bulldog6925
@bulldog6925 5 ай бұрын
Huh?
@kennethwright870
@kennethwright870 5 ай бұрын
X^(3/4)=2 X=4
@joso5554
@joso5554 4 ай бұрын
Not even close. How do you get from line 1 (right) to line 2 (false)?!?
@kennethwright870
@kennethwright870 4 ай бұрын
Of course we have to raise both sides to ^(4/3) to get the left side exponent to 1, so 2^(4/3)
@RodCalidge
@RodCalidge 5 ай бұрын
SORRY, BUT A GRADE 2 STUDENT COULD DO THIS IN UNDER 20 SECONDS.
@Astrobrant2
@Astrobrant2 4 ай бұрын
2nd grade students are barely learning the concept of multiplication. They have no idea what exponents are -- much less, how to deal with fractional exponents (all caps notwithstanding).
@RodCalidge
@RodCalidge 4 ай бұрын
@Astrobrant2 Apologize for the caps. I hadn't noticed my keyboard was set on capitals when I posted. My bad. And you're right. A Second grade student would NOT be expected to know this level of math. Don't know what I was thinking. (Caps intentional this time ).
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