Math, asked by nehasingh8417, 8 months ago

What is the sum of first 25 terms of an arithmetic sequence 12,23,34....

Answers

Answered by jp765873

1

Answer:

Sn =n/2 [2a+(n-1)d]

S25= 25/2 [2×12+(25-1)11]

= 25/2[24+264]

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