Matematika :

Aug 4, 2011

SOAL JAWAB MATEMATIKA : a100 + a99

Soal
Diketahui bahwa a1 = 2, a2 = 3, an = an-1 + 2an-2, berapakah is a100 + a99?
Jawab
an = an-1 + 2an-2
an + an-1 = 2(an-1 + an-2)
= 2n-2(a1 + a2)
Maka  a100 + a99 = 298 x 5.
Diposkan oleh di
Label: Pendidikan

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