tentukan N jika? 2+2²+2³+...2n=510
Matematika
alfurqan13ptk
Pertanyaan
tentukan N jika? 2+2²+2³+...2n=510
1 Jawaban
-
1. Jawaban BLUEREAPER
r = 2
Sn = a(r^n -1)/(r-1)
510 = 2(2^n -1)/(2-1)
510 = 2(2^n -1)
255 = 2^n -1
254 = 2^n
log 254 = n log 2
n = log 254/log2