6th Class Mathematics Exponents and Power Question Bank Exponent and Powers

  • question_answer Solve  \[{{81}^{2x}}={{\left( 729 \right)}^{2}}\]

    A) \[x=\frac{3}{4}\]                              

    B) \[x=\frac{2}{3}\]

    C) \[x=\frac{5}{6}\]                              

    D) \[x=\frac{3}{2}\]

    Correct Answer: D

    Solution :

    \[{{\left( {{9}^{2}} \right)}^{2x}}={{\left( {{9}^{3}} \right)}^{2}}\Rightarrow {{9}^{4x}}={{9}^{6}}\Rightarrow 4x=6\Rightarrow x=\frac{3}{2}\]

adversite



LIMITED OFFER HURRY UP! OFFER AVAILABLE ON ALL MATERIAL TILL TODAY ONLY!

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

Free
Videos