Question

The 11th term and the 21st term of an A.P. are 16 and 30 respectively, then find the 16th term of that A.P.

Answer 1

Answer:

a+10d=16, a+20d=30

a+10d=16

a+20d=30

-. -. -

-10d.=-14

d= 7/5

then,=a+ 10×7/5=16

= a+ 14 =16

a= 2

so a+15d is 16th term

= 2+15×7/5

=23

Answer 2

Answer:

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