Question

16x2^n+1-8x2^n
16 x 2^n+2 - 4x 2^n+1​

Answer 1

Answer:

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Step-by-step explanation:

16×2n+1−4×2n

=16×22×2n−2×22×2n16×2×2n−4×22n     (asam+n=am−an)

=2n(16×22−2×22)2n(16×2−4)

=16×4−2×432−4=5628=21