Q. 84.4( 8 Votes )

# The first term of an A.P. is 2 and the last term is 50. The sum of all these terms is 442. Find the common difference.

Answer :

a = 2, l = 50

S_{n}= [a + l]

442 = [50 +2]

n = = 17

n = + 1

17 = + 1

16d = 48

d = 3

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