Question

find rth term of an ap whose sum of first n terms is 2n+3n^2

Answer 1

hy mate here is your anshwer=>>

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=>2n+3n^2

a=>2n

d=>a2-a1
=>3n^2-2n=3n

ab=x

n=y
sorry i can not solve this problem on typing so sorry:'(:'(