Question

if 24th term of ap is twice the 10th term prove that the 72nd term is twice the 34th term​

Answer 1

Answer:

a24=2(a10)

a+23d=2(a+9d)

a+23d=2a+18d

5d=a

a72=2(a34)

a+71d=2(a+33d)

a+71d=2a+66d

5d+71d=2(5d)+66d

76d=10d+66d

76d=76d

Hence proved.

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Answer 2

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