Hexaware
Company
Logical Reasoning
Mathematical Reasoning
x+(1/x) = 2.5 find x^2 + (1/x^2)
Read Solution (Total 3)
-
- 4.25
squaring on both sides (x+1/x)^2=2.5^2
x^2+1/X^2=6.25-2
x^2+1/X^2=4.25 - 12 years agoHelpfull: Yes(11) No(1)
- x^2+1/x^2=(x+1/x)^2-2*x*1/x=(2.5)^2-2[2.5 value is given]=6.25-2=4.25..ans is 4.25.
This is based on this formula a^2+b^2=(a+b)^2-2*a*b - 10 years agoHelpfull: Yes(1) No(0)
- x+ (1/x)=2.5
x^2+ (1/x^2) +2= 5 (squaring both sides)
x^2 +(1/x^2)=3 - 12 years agoHelpfull: Yes(0) No(6)
Hexaware Other Question