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+1 vote
8.1k views
in Mathematics by (38.6k points)
reopened by

Let a1 , a2 ,....,a10 be an AP with common difference –3 and b1 , b2 ,...., b10 be a GP with common ratio 2. Let ck = ak + bk , k = 1,2,..., 10. If c2 = 12 and c3 = 13, then

\(\displaystyle\sum_{k=1}^{10} c_k\) is equal to _____.

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1 Answer

+2 votes
by (33.5k points)

c2 = a2 + b2 = a1 – 3 + 2b1 = 12

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