Question

If 7th term of an

a.P is 1/9 and 9th term is 1/7, find 63rd term.

Answer 1

Step-by-step explanation:

............................

Answer 2

Step-by-step explanation:

a7=1/9

a+6d=1/9

a=1/9-6d

a9=1/7

a+8d=1/7

1/9-6d+8d=1/7

1/9+2d=1/7.

2d=1/7-1/9

2d=9-7/63

2d=2/63

d=1/63

so,

a=1/9-6d

a=1/9-6/63

a=7-6/63

a=1/63

now,

a63=a+62d

=1/63+62/63

=1+62/63

=63/63

=1

so, a63=1