Find the sum of the products of the corresponding terms of the sequences 2, 4, 8, 16, 32 and 128, 32, 8, 2, .
Required sum = 2 × 128 + 4 × 32 + 8 × 8 + 16 × 2 + 32 ×
Here, 4, 2, 1, is a G.P.
First term, a = 4
Common ratio, r =
It is known that,
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