Question

The 11th term and the 21st term of an A.P. are 16 and 29 respectively then find:

a. The first term and common difference.

b. The 34th term.

c. ‘n’ such that tn = 55.

Answer 1

11th=16 and 21th=29
a+10d=16
a+20d=29
D=13/10