Question

8. If the sum of n terms of an A.P. is nA+n+B, where AB are constants, then its common difference will be​

Answer 1

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Sum = An+Bn²

S¹ =A+B

S²=2A+4A

S³=3A+9A

a¹=A+B

a²=S²−S¹=A+3B

d=a² −a¹=3B−B=2B

Answer 2

Step-by-step explanation:

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