Math, asked by cpstudio22, 2 months ago

21. If third term of an A.P.is -2 and thirteenth term is 18 then find its first term and common difference.

Answers

Answered by amitsharma777222999

1

Answer:

a+12d=18

a+2d=-2

subtracting

10d=20

d=2

a+2*2=-2

a+4=-2

a=-6

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