- #1

karush

Gold Member

MHB

- 3,269

- 5

$\displaystyle{d\over dx}x^n = nx^{n-1}$

by observation we know the derivative of the inside is multiplied to the outside

thus this leaves option

**(E)**the other steps probably are not necessary

ok I am sure this could be worded better. but I think many students take these tests and are not used multiple choice and just plunge into timely calculations when observation could be within a few seconds