Matematika

Pertanyaan

tentukan N jika? 2+2²+2³+...2n=510

1 Jawaban

  • 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

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