1.

Solve the following equation: 1/x - 1/x-2 = 3.\(\frac1x - \frac1{x -2} = 3, \,x\ne0,2 \)

Answer»

\(\frac1x - \frac1{x -2} = 3, \,x\ne0,2 \)

⇒ \(\frac{x -2-x}{x(x -2)}=3\)

⇒ \(-2 = 3x^2 - 6x\)

⇒ \(3x^2 - 6x + 2 = 0\)

⇒ \(x = \frac{6\pm\sqrt{36-24}}{6}\)

\(= \frac{6 \pm2\sqrt3}{6}\)

\(= \frac{3\pm\sqrt3}{3}\)

\(= 1\pm \frac1{\sqrt3}\)

Hence, solutions are \( 1+ \frac1{\sqrt3}\) or \( 1- \frac1{\sqrt3}\).



Discussion

No Comment Found

Related InterviewSolutions