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If 𝑎 = 3 a=3 and 𝑑 = 0 d=0, what is the 5th number in the arithmetic series?

Medium FPSC Past Papers FPSC PAST PAPERS FPSC

Question

If 𝑎 = 3 a=3 and 𝑑 = 0 d=0, what is the 5th number in the arithmetic series?

A 3 B 5 D 15

Explanation

Explanation
If the common difference d = 0 d = 0 , the sequence is constant. General formula for an arithmetic sequence:
a n = a + ( n − 1 ) d a_n = a + (n - 1)d For d = 0 d = 0
a n = 3 + ( n − 1 ) × 0 = 3 a_n = 3 + (n - 1) times 0 = 3

So, the 5th number a 5 = 3 a_5 = 3

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