Question

if the an=2n²+1 then find d​

Answer 1

Answer:

6

Step-by-step explanation:

an = 2n^2 + 1

So

a1 = 2(1)^2 + 1 = 2+1 = 3

a2 = 2 (2)^2 + 1 = 8+1 = 9

So d = a2 - a1 = 9-3 = 6

Answer 2

Answer:

Step-by-step explanation: