Question

First term of an arithmetic sequence is 10 and its 21st term is 230.Form the sequence​

Answer 1

Answer:

General form of an A.P. is -

a, a+ d, a+2d, a+3d , . . . . . . . . , a+ (n-1)d,

Here, a=10,

a21= 230

using a+(n-1)d = an(nth term)

n=21, an= 230, a=10,

10 + 20 d = 230, 20 d = 220, d= 11

Therefore the sequence is 10, 21, 32, 43, 54, . . . . . . .