Question

sum of n terms of the ap is 3n^2+2n ,what is n term of ap?

Answer 1

Answer:

6n-1

Step-by-step explanation:

Sn = 3n^2 + 2n

S1 = 3(1^2) + 2*1

S1 = 5

Similarly,

S2 = 16

therefore, a1 = 5, a2 = S2-S1 = 11

d =6

so nth term is

An = a+ (n-1)d

An = 5+(n-1)6

An = 5+ 6n-6

An = 6n-1

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