Question

The number of terma in the A.P. 2,5,8.........,59 is

Answer 1

Answer:

first term (a) = 2

common difference (d) = 5-2 = 3

last term(l) = 59

a_n = a + (n-1)d

a_n = 59

or, 59 = 2+ (n-1)3

or, 57 = (n-1)3

Or, 19 = n-1

or, n = 20

Therefore the total number of terms in this AP is 20