Question

Theforth term of an ap is 11 the suum of the fifth and the seventh term of the ap is 34 find the common differebce

Answer 1

Answer:

d=3

Step-by-step explanation:

1. a4=11,,a5+a7=23,,. 2a+10d=34-a+3d=11===a+7d=23,,,a=23-7d. 23-7d+3d=11,. -4d=-12. d=11/4=3. a=23-7d. 23-7(3)____2. so common difference is 2