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cuzzin Group TitleBest ResponseYou've already chosen the best response.0
I'm a little stumped on this "Give f '(1) problems.
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
First, find the derivative. What is \(f'(x)\)?
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
No, no. It'd be\[f'(x) = {d \over dx}2x^2  x\]Do you know what derivative is?
 2 years ago

febylailani Group TitleBest ResponseYou've already chosen the best response.0
Let f(x)=(2x^2x). Give f '(1). f'(x) = 4x f'(1) = 4(1) = 4 . am i right?
 2 years ago

cuzzin Group TitleBest ResponseYou've already chosen the best response.0
Well we are just starting the chapter on derivatives, so I'm still figuring them out. Mostly we've been dealing with finding the slope of tangent and normal lines.
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
@febylailani I should point out that,\[f'(x) = 4x  1\]
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
@cuzzin That includes differentiation too!
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
\[f'(x) = 4x  1\]\[f'(1) = 4(1)  1\]
 2 years ago

Omniscience Group TitleBest ResponseYou've already chosen the best response.0
I think you should write it as: \[\frac{d}{dx} \left(2x^{2}x\right) or \frac{d}{dx} 2x^2\frac{d}{dx} x\] Or people would get confused,which was evident :)
 2 years ago

akash809 Group TitleBest ResponseYou've already chosen the best response.0
why to make things more complicated
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
@Omniscience is pretty well till now, and then the power rule!:)
 2 years ago

febylailani Group TitleBest ResponseYou've already chosen the best response.0
ah!! yup! sorry i forgot. careless _ aaaaaccckkkkk
 2 years ago

cuzzin Group TitleBest ResponseYou've already chosen the best response.0
Ok, where does the (4x1) come from?
 2 years ago

febylailani Group TitleBest ResponseYou've already chosen the best response.0
from differential.
 2 years ago

febylailani Group TitleBest ResponseYou've already chosen the best response.0
but differential is the short way. before that, there's limit. the formula is a.n.x^(n1). i.e. f(x) = 2x^3 ; a=2 ; n = 3 so, f'(x) = 2.3.x^(31) = 6x^2 cmiiw
 2 years ago
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