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amorfide
Group Title
y=3(x+2)²
differentiate it please, but do it via substitution method, i can differentiate this but i can not do the substitution method
 one year ago
 one year ago
amorfide Group Title
y=3(x+2)² differentiate it please, but do it via substitution method, i can differentiate this but i can not do the substitution method
 one year ago
 one year ago

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satellite73 Group TitleBest ResponseYou've already chosen the best response.2
the derivative of something squared is two times something, times the deriavtive of something
 one year ago

amorfide Group TitleBest ResponseYou've already chosen the best response.0
LOL i know how to do it i just cant do the whole let u= ...
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
or you can multiply out an get \[3(x^2+4x+4)=3x^2+12x+12\]\]
 one year ago

amorfide Group TitleBest ResponseYou've already chosen the best response.0
i know i multiply by the power take one off then multiply by derivative of the inside of bracket but i need the substitution method
 one year ago

precal Group TitleBest ResponseYou've already chosen the best response.0
use chain rule
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
then ignore it, it is a crutch. if you know the chain rule it is entirely unnecessary to say \(u=x+2\) \(y=u^2\) etc
 one year ago

precal Group TitleBest ResponseYou've already chosen the best response.0
yes, but I believe those were the given instructions
 one year ago

amorfide Group TitleBest ResponseYou've already chosen the best response.0
i really would love the substitution method explained
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
i guess you would say \[u=x+2\] \[y=3u^2\] etc etc, but it is silly
 one year ago

amorfide Group TitleBest ResponseYou've already chosen the best response.0
ahhhh okay, then dy/du=6u then du/dx=1 mutliply then substitute u thank you <3
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
you have a composition of functions 1) first add 2 2) then square the result, multiply by 3 inner function can be written as \(u=x+2\) outer as \(y=3u^2\)
 one year ago

amorfide Group TitleBest ResponseYou've already chosen the best response.0
so i substitute u= then y is equal to the new equation with u substituted thank you!
 one year ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
yes, that is correct you get \[6u=6(x+2)\]
 one year ago

precal Group TitleBest ResponseYou've already chosen the best response.0
do you know the chain rule?
 one year ago

precal Group TitleBest ResponseYou've already chosen the best response.0
Take the derivative of the inside, take the derivative of the outside leave the inside alone
 one year ago

precal Group TitleBest ResponseYou've already chosen the best response.0
dw:1349725718613:dw
 one year ago

amorfide Group TitleBest ResponseYou've already chosen the best response.0
i know that wy i was struggling with the substitution method i know how to do it straight away though
 one year ago

precal Group TitleBest ResponseYou've already chosen the best response.0
technically the sub method is the chain rule..
 one year ago
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