The first, second and last terms of an A.P. are 4, 7 and 31
respectively, then

(1) the third term is 15

(2) the no. of terms is 10

(3) the sum of the terms is 155

(4) None of these



The first, second and last terms of an A.P. are 4, 7 and 31 respectively, then (1) the third ter..

Answer / ali

( 2 ) the no. of terms is 10

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