Mathematics

9th -

12thgrade

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Fractional Indices

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  • 1. Multiple Choice
    1 minute
    1 pt

    Which of the following is incorrect?

    a2×a6=a12a^2\times a^6=a^{12}

    a8÷a3=a5a^8\div a^3=a^5

    a6×a3=a9a^6\times a^3=a^9

    (2a)2=(4a2)\left(\frac{2}{a}\right)^2=\left(\frac{4}{a^2}\right)

  • 2. Multiple Choice
    1 minute
    1 pt

    Which of the following is incorrect?

    You may choose more than 1 answer.

    a3+a3+a3=a9a^3+a^3+a^3=a^9

    (3a2)3=27a6\left(3a^2\right)^3=27a^6

    (x2y)3=(x6y3)\left(x^2y\right)^3=\left(x^6y^3\right)

    (a3b)2=(a23b2)\left(\frac{a}{3b}\right)^2=\left(\frac{a^2}{3b^2}\right)

  • 3. Multiple Choice
    30 seconds
    1 pt
    Image

     (718)1\left(\frac{7}{18}\right)^{-1}  is equal to ...

     718-\frac{7}{18}  

     187-\frac{18}{7}  

     187\frac{18}{7}  

     718\frac{7}{18}  

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