Question

Question 10 If the sum of first n terms of an AP is An + Bn? where A and B are constants. The
common difference of AP will be
(a) A+B
(b) A-B
(c) 2A
(d) 2B

Answer 1

Answer:

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Step-by-step explanation:

Correct option is D = 2B

Sum = An+Bn²

S1 =A+B

S2=2A+4A

S3=3A+9A

a 1 =A+B

a 2=S2 −S1=A+3B

d=a2 −a1 =3B−B=2B