Question

Jika hasil 2 + 2^2 + 2^3 + ... + 2^n =510. Maka nilai n adalah...

Answer 1

8.. 2 + 4 + 8 + 16 + 32 + 64 + 128 + 256 = 510

Answer 2

R = 2
Sn = 2 * [{(2^n)-1}/1}
510 = 2 * {(2^n) - 1}
510 = (2 * 2^n) - 2
512 = 2 * 2^n
256 = 2^n
2^8 = 2^n
n = 8