Q. 8

  1. (\frac{1}{4})^{-2}

    4^2 = 16

  2. (64)^\frac{2}{3}

    (4^3)^\frac{2}{3} 4^2 = 16

  1. (\frac{{4x^2}{y^9}}{{x^4}y})^\frac{1}{2} (\frac{2^2x^2y^9}{x^4y})^\frac{1}{2} \frac{2xy^\frac{9}{2}}{x^2y\frac{1}{2}} \frac{2xy^{\frac{9}{2}-{\frac{1}{2}}}}{x^2} \frac{2y^4}{x}