Math, asked by bmebin73, 9 months ago

find the sum of first 25 terms of the sequence 12,23,34.....

Answers

Answered by kgisme4

3

Answer:

3600

Step-by-step explanation:

A=12

D=11

An=276. (last term)€

S=N/2(A+An)

S=25/2(12+276)

S=25/2(288)

S=25*144

S=3600

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