Get Answers to all your Questions

header-bg qa

The sum of the three terms in a. p. in 15 and sum of their squares is93. find the numbers.

Answers (1)

Assume three terms in A.P are a-d, a, a+d

a-d+a+a+d = 15

3a =15  => a=5

(a-d)+a2+(a+d) = 93

a2 + d2- 2ad + a2 +a2 + d2 + 2ad = 93

3a2 + 2d2=95

75 + 2d2=95  => d=√10

Hence , the numbers are 5-√10,5, 5+√10.

Posted by

Ravindra Pindel

View full answer