Question

If the sum of n terms of an A.P. is 4n2 - 3 n, then what is the 18th term?
a) 128 b) 137 c) 198 d) 254​

Answer 1

Answer:

There is no correct answer is option

the correct answer is 8n-7

hope it is helpful

Answer 2

Answer:

B) 137

Step-by-step explanation:

Sum of n terms of an A.P = 4n^2 - 3n,

Basically,

The 18th term = Sum of 18 terms - Sum of 17 terms

So 18th term = 4(18^2 - 17^2) - 3(18-17) = 137.