2. Questions Bank
  3. 8th Class
  4. Mathematics
  5. Algebraic Expressions

8th Class Mathematics Algebraic Expressions Question Bank Algebraic Expressions & Identities

  • question_answer
    If \[x-\frac{1}{x}=3\] then find \[\frac{x}{{{x}^{2}}+1}\] is

    A)  9                                

    B)  \[\frac{1}{3}\]             

    C)  13                               

    D)  \[\frac{1}{\sqrt{13}}\]

    Correct Answer: D

    Solution :

    (d): Write \[\frac{x}{{{x}^{2}}+1}=\frac{1}{\frac{{{x}^{2}}+1}{x}}=\frac{1}{x+\frac{1}{x}}\] and use logic as in Q14 OR Q15 OR Q16.


You need to login to perform this action.
You will be redirected in 3 sec spinner