Question discussion

What is the sum of the first 15 terms of the arithmetic progression 3, 7, 11, …?

1850Medium DSSSB TGT Computer Science 0 replies 1 views

Correct answer: A

Explanation

S = (n/2)[2a + (n − 1)d] = (15/2)(6 + 56) = 465.

Nobody has replied yet. Start the discussion!