Question

In the arithmetic sequence 8,14,20 what is its 20th term?

Answer 1

Answer:

20th term=122

Answer 2

A.P.- 8, 14, 20,.............

Given, a (first term) = 8

d (common difference) = 6

n ( term of a.p.) = 20

Thus, using

$a{n} = a + {n - 1}d \\ = 8 + {20 - 1} \times 6 \\ = 8 + 19 \times 6 \\ = 8 + 114$

Therefore 20th term of AP is 122