Math, asked by shubhamkothiyal18, 10 months ago

the sum of n terms of an ap is n^2+3n find its common difference

Answers

Answered by TħeRøмαи

Answer:

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$S1= 1^2 + 3 × 1$

$S1 = 1+3$

$S1 = 4$

$S2 = 2^2 + 3 × 2$

$S2 = 4 +6$

$S2 = 10$

$A2 = S2-S1$

$A2 = 10-4$

$A2 = 6$

$D = A2-A1$

$D = 6-4$ $S1=A1$

$D = 2$

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