Q. 18 B5.0( 2 Votes )

In the following A.P., find the missing terms:

54, ,, 42

Answer :

Here, a = 54 , n = 4 and l = 42


We have,


l = a + (n – 1)d


42 = 54 + (4 – 1)d


42 = 54 + 3d


–12 = 3d



So, the missing terms are –


a2 = a + d = 54 – 4 = 50


a3 = a + 2d = 54 + 2(–4) = 54 – 8 = 46


Hence, the missing terms are 50 and 46


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