Q19 of 178 Page 548

The first term of an AP is p and its common difference is q. Find its 10th term.

Here, given: first term = p

Common difference = q

To find: a₁₀

a₁₀ = a + (10 - 1)d

⇒ a₁₀ = p + 9q

∴ 10^th term of the given AP will be p + 9q.

Find the sum of first n natural numbers.

Find the sum of first n even natural numbers.

If 4/5, a, 2 are in AP, find the value of a.

If (2p + 1), 13, (5p – 3) are in AP, find the value of p.