math sequenc
posted by HELP HELP MNHS on .
the nth term of the geometric progression is 3(2^n1). how many terms are less than 200?

let's see what term is close to 200
3(2^n  1) = 200
2^n  1 = 200/3
2^n = 200/3 + 1 = appr 67
I know 2^6 = 64
so n is either 6 or 7
check:
3(2^6  1) = 189
3(2^7  1) > 200
so there are 6 terms less than 200