Question

PreCalc help with sums. I will mark brainliest. (also can you explain WHY you got what answer you got? Thanks)

Answer 1

Answer:

8

Step-by-step explanation:

a = -4

r = 16/-4 = -4

Sn = a(r^n - 1)/(r - 1)

52428 = -4[(-4)^n - 1]/(-4-1)

(-4)^n - 1 = 65535

(-4)^n = 65536

Means n is even

(4)^n = 65536

nln(4) = ln(65536)

n = 8