Math, asked by dipakjadhav8635, 10 months ago

The first term of an .P. is 1 and the sum of first 15 terms is 225, find the common difference

Answers

Answered by iamsuveer1807

2

Answer:

a=1

S15=225

an= a+ a(n-1)d

a15= 1 +1(14)d

a+14d= 15d

a=15d-14d

a=d

d=1

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