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Show that a(1), a(2),……, a(n)…. Form an ...

Show that `a_(1), a_(2)`,……, `a_(n)`…. Form an AP where `a_(n)` is defined as below:
(i) `a_(n) = 3 + 4n`, (ii) `a_(n) = 9-5n`
Also find the sum of the first 15 terms in each case.

Text Solution

Verified by Experts

The correct Answer is:
(i) 525, (ii) `- 465`
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