49. The nth term of an arithmetic progression is given by the formula , where d is the common difference and is the first term. If the third term of an arithmetic progression is and the sixth term is , what is the seventh term?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

First find the arithmetic difference d: (1/4-5/2)÷3=-3/4.

a7=a6+d=1/4-3/4=-1/2