Question

An=2n²-1 then value of 4th term is what?

Answer 1

Answer:

31

Step-by-step explanation:

An= 2n^2 - 1

we know that n=4

therefore, substituting the value of n=4,

An=2n^2-1

=2(4)^2-1

= 2(16)-1

= 32-1

= 31