Question

The sum of three consecutive terms of an increasing AP is 21 and the product of the first and the third of these terms is 45, then the third term is

Answer 1

Answer:

The sum of the 3 numbers in A.P is 21 & the product of the first & third number of the sequence is 45. What are the 3 numbers? Hence, the numbers are 5, 7 & 9 when d = 2 and 9, 7 & 5 when d = -2.