Question

When shall we use a- d a a+ d in an ap and a a+d a+2d?

Answer 1

Answer:

Step-by-step explanation:

They both are to find three consecutive numbers in AP depending upon the type of question...

If question only tells to find three AP without giving value of 'a' then we use a- d, a, a+d...

Otherwise we use a, a+ d, a+2 d...

Hope it helps you...