Math help.

1. Nov 22, 2004

glycogen

Hey!
I'm having trouble with this question- i just cant get the answer!

Find the number of terms needed to be added for the sum to exceed 1000 000 in the series 4+16+64....

Thans so much fo your time!

2. Nov 22, 2004

so-crates

Well heres a hint, the series increasing powers of some number