If 3x, x+4 and x^2+2x+4 are the first three terms of an A.P, find the possible numerical values of x. Hence, find the respective eleventh term for each value of x.

Answer 1

A.P. has a common difference. Therefore

(x + 4) - 3x = (x² + 2x + 4) - (x + 4)

Solve for x and you have the first term and the common difference.

Can you do that?