Question

if f(x)= (1+x)(1+2x)(1+3x)...(1+nx) find f'(0)

Answer 1

f'(0) = 1+ 2 + 3+...+ n

Answer 2

f'(x) = (1+2x)(1+3x)...(1+nx)+2*(1+x)(1+3x)..(1+nx)+3*(1+x)(1+2x)...(1+nx)

Answer 3

the rest is myko's

Answer 4

:)

Answer 5

oops ... forgot to add ...+n*(1+x)(1+2x) .... (1+(n-1)x)