Question

Determine an AP whose third term is 9 and when fifth term is substracted from eighth term we get six

Answer 1

Answer:

i) a+2d=9;

ii) a+4d-(a+7d)=6;

Therefore,

-3d=6;

d= -2;

Therefore a=13;

Therefore AP = 13,11,9,7,5,3,......