Question

Find the number of terms of the ap 5,11,17.......125

Answer 1

a= first term = 5

n = no. of terms

d = common difference= 11-5 and 17-11=> 6

an = nth term or last term = 125

thus,

an= a+ (n-1)d

125= 5+ (n-1) 6

120 = 6n -6

6n= 126

n= 21

Answer 2

Answer:

the pattern is 6x-1

There r 21 numbers.

So the numbers will be

5, 11, 17, 23, 28, 34, 39, 44, 49, 54, 59, 64, 69, 74, 79, 84, 89, 94, 100, 106, 112, 117...