Question

What's the derivative of f(x)=(5+4x)^(1/2)

Answer 1

Chain Rule

Answer 2

Is it f'(x)=(((5/2)+2x)^(-1/2))4???

Answer 3

You can't distribute the 1/2

Answer 4

(1/2)(5+4x)^-1/2 (4)

Answer 5

@motza11 is correct. It could even be simplified yet

Answer 6

Why not?

Answer 7

example...
4(x+2)^2
(4x+8)^2
16x^2+64x+64

4(x+2)^2
4(x^2+4x+4)
4x^2+16x+16

Do you see how they are not the same answers

Answer 8

PEMDAS

Answer 9

ohh, Ok! PEMDAS??? How about for the derivative of y=(1-x^2)^20. I got 20(1-x^2)^12*(2x). Do I leave it like that of can I multiply 20 and 2x?

Answer 10

i actualu got a (-2x) but yeah,

Answer 11

http://en.wikipedia.org/wiki/Order_of_operations

Answer 12

shouldn't it be:
20(1-x^2)^19(-2x)

Answer 13

What the heck, I typed it up all wrong. xD Yeah. That's what I got. Can I multipy the 20 and the -2x?

Answer 14

@ChmE I learned it as "please excuse my dear aunt sally" xD

Answer 15

I could never remember phrases like that

Answer 16

haha, So In the answere, can I combine 20 and (-2x)??? or will thath also ruin the order of operations?