Question

Find the 11th term of the arithmetic sequence 1, 4, 7, 10, ...

Answer 1

`a1 = 1 \\ d = 4 - 1 = 3 \\ a11 = a1 + 10d \\ a11 = 1 + 10 * 3 \\a11 = 1 + 30 = 31 \\ thank \: you`

Answer 2

Explanation:

1,4,7,10

r=3

a1+10r=a11

a1+30=a11

a1=1

a11=31