Math, asked by shailendra42, 1 year ago

An AP consist of 21 terms The sum of three term in the middle is 63 and sum of last three terms is 90 Find AP

Answers

Answered by rlakhera38p8q1bb

1

3a+30d=63
3a+57d=90
subtracting above equations:
d=1
a=11
so
AP is 11,12,13,14.....

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