Question

Find the sum of 12 terms of ap, nth term is given by an is equal to 3 n + 4

Answer 1

Answer:

282

Step-by-step explanation:

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Answer 2

Given; an = 3 n + 4

To Find; the sum of 12 terms of the ap, nth term is given by an is equal to 3 n + 4

Solution; n=12 ,Sn=?, an=3n+4

a1=3+4=7, a12= 40

S12=n(a+ an)/2= 6*(47)=282

Hence the sum is 282

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