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1, 3, 5, ..... എന്ന സമാന്തരശ്രേണിയിലെ എത്രാമത്ത പദമാണ് 55?

A27

B26

C25

D28

Answer:

D. 28

Read Explanation:

nth term = a + (n-1)d 1, 3, 5, .... a = 1 d = 3 - 1 = 2 55 = 1 + (n-1) 2 55 = 1 + 2n - 2 2n - 1 = 55 2n = 56 n = 28


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