If 5 + 7 + 9 + ........... n = 437, then n = ____
(A) 19
(B) 20
(C) 21
(D) 22
Correct option (A) 19
Explanation:
5 + 7 + 9 + .............. upto n terms = 437 find = n.
a = 5, d = 7 – 5 = 2, Sn = 437, n = ?
