8. The sum of three numbers in AP is-3 and their product is 8, then sum of squares of the numbers is
a)9
b)10
c)12
d)21
Answers
Answered by
30
Solution
Option (D) is correct
Given
- Sum of the three numbers is - 3
- Product of the three numbers is 8
To finD
Sum of Square of the numbers
Let the three numbers be a - d,a and a + d
Therefore,
Also,
The first term and common difference of the AP are - 1 and ± 3 respectively
Now,
Using + 3 or - 3,we would obtain the same result
Thus,
Sum of the square of the three numbers is 21
Similar questions