Question

find "x"
-4,-1,2,...……..,x=437

Answer 1

using AP a1=-4,d=3an=x,sn=437
an=a +(n-1)d;x=-4+(n-1)3-1eqn
sn=n/2{a+an};437=n/2{-4+an}-2eqn
eliminate the 2 eqn you get n value and x value

Answer 2

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