8√2n
2(n+2)√2
√2(n+3)
8n√2
Correct answer is B
8√2, 16√2, 32√2, ..
a=8√2;r=T2T1=16√28√2=2
Tn=arn−1
Tn=8√2×2n−1
Tn=23×2n−1×√2
Tn=23+n−1×√2
∴
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