Q6 of 167 Page 19

How many terms are there in the A.P.

We know, a_n = a + (n – 1)d where a is first term or a₁ and d is common difference and n is any natural number

To find total terms of the A.P., put a_{_n}is last term of A.P.

⇒ n = 27

Hence, there are total 27 terms in the given A.P.

Which term of the sequence 12 + 8i, 11 + 6i, 10 + 4i, … is (a) purely real (b) purely imaginary ?

How many terms are in A.P. 7, 10, 13,…43?

The first term of an A.P. is 5, the common difference is 3, and the last term is 80; find the number of terms.

The 6^th and 17^th terms of an A.P. are 19 and 41 respectively. Find the 40^th term.