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Verified answer
Un = ar^(n-1)a = 64
r=½
maka
rumus suku ke n
Un = ar^(n-1)
= 64(½^(n-1))
= 64.½^n .½^-1
= 64 . ½^n. 2
= 128.½^n
suku ke 10
Un = 128.(½)^10
= 2^7 . 2^-10
= 2^-3
= 1/8