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CBSE Class 10 Answered

which term of the Ap 3,8 13,18,...is 78
Asked by svir8454 | 27 Dec, 2024, 11:57: AM
answered-by-expert Expert Answer

Given AP is 3, 8, 13, 18,...

First term, a = 3 and common difference, d = 8 - 3 = 5

Let nth term of AP be 78.

Then, a + (n - 1)d = 78

3 + (n - 1)5 = 78

(n - 1)5 = 75

n - 1 = 15

n = 16

Thus, the 16th term of an AP is 78.

Answered by Rashmi Khot | 27 Dec, 2024, 12:36: PM
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