supaya 2^n + 2^n-1 + ... + 2^2 + 2 + 1 = 255 maka n=...
Matematika
ellyzarahm
Pertanyaan
supaya 2^n + 2^n-1 + ... + 2^2 + 2 + 1 = 255 maka n=...
1 Jawaban
-
1. Jawaban khominghoo
128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255
2^7 + 2^6 + 2^5 + 2⁴ + 2³ + 2² + 2¹ = 128 x ( 1 - ½ⁿ)/(1-½) = 256 - 1
n = 7