Question

The 3
rd term of an AP is 3 and 11th term is -21, find its first term and common difference.

Answer 1

Answer:

Clearly, the given AP has first term a=−3 and common difference d=

2

−1

−(−3)=

2

5

.

Also n=11

∴a

11

=a+10d

=−3+10×

2

5

=−3+25

=22

Hence, Option B is correct.

Step-by-step explanation:

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