I.- Operaciones con exponentes fracionarios o negativos


	761.		762.

	$\frac{c}{b^{3}d^{2}}\, .\, \frac{b^{2}}{a^{-4}c^{2}}$		$3a^{-2}b^{-3}\, .\, 5a^{-3}b^{-4}$


	763.		764.

	$4a^{-3}b^{2}\, .\, 6a^{2}b^{-4}$		$3a^{2}b^{\frac{2}{3}}c^{\frac{1}{2}}\, .\, 5a^{\frac{3}{5}}b^{\frac{4}{3}}c$


	765.		766.

	$-2a^{\frac{1}{2}}bc^{\frac{3}{4}}\, .\, 4a^{\frac{2}{3}}b^{\frac{1}{4}}c^{\frac{1}{5}}$		$a^{\frac{3}{5}}\, .\, a^{\frac{1}{3}}\, .\, a^{\frac{3}{4}}$


	767.		768.

	$b^{\frac{1}{4}}\, .\, b^{\frac{5}{6}}\, .\, b^{\frac{2}{3}}$		$a^{\frac{3}{5}}\, .\, a^{\frac{2}{3}}$


	769.		770.

	$a^{-\frac{3}{4}}\, .\, a^{\frac{5}{6}}$		$\sqrt[4]{a^{\frac{1}{27}}\sqrt[6]{a^{5}}}$

771.

$20a^{\frac{2}{3}}bc^{2}\, :\, 5a^{\frac{1}{3}}b^{\frac{1}{2}}c^{\frac{3}{4}}$

772.

$\left ( 6a^{2}b^{\frac{4}{3}}-4ab^{2}+12a^{3}b^{\frac{5}{2}} \right )\, :\, 2a^{\frac{1}{2}}b$


	773.		774.

	$a:a^{\frac{2}{3}}$		$a^{\frac{3}{2}}:a^{\frac{1}{2}}$


	775.		776.

	$a^{\frac{1}{2}}:a^{\frac{1}{3}}$		$\left ( 5a^{2}b^{\frac{2}{2}}c^{\frac{1}{2}} \right )^{2}$


	777.		778.

	$\left ( -a^{\frac{2}{3}}b^{\frac{1}{4}}c^{2} \right )^{\frac{3}{2}}$		$a^{\frac{2}{3}}:a^{-\frac{3}{4}}$


	779.		780.

	$\left ( a^{\frac{2}{3}}+a^{2}b^{\frac{1}{4}} \right )^{2}$		$a^{\frac{3}{4}}b^{-\frac{1}{2}}c^{-1}\, .\, a^{2}b^{\frac{2}{3}}c^{\frac{3}{5}}$


	781.		782.

	$\sqrt{25a^{\frac{2}{3}}\, b^{\frac{1}{4}}\, c^{\frac{3}{5}}}$		$\sqrt[3]{-8a^{\frac{2}{3}}\, b^{\frac{1}{4}}\, c^{\frac{2}{5}}}$


	783.		784.

	$3a^{-2}b^{\frac{2}{3}}\, .\, 2a^{-\frac{4}{5}}b^{\frac{1}{2}}c^{2}$		$a^{\frac{3}{4}}:a^{\frac{4}{5}}$


	785.		786.

	$a^{\frac{2}{5}}b^{\frac{3}{4}}:a^{-\frac{1}{2}}b^{\frac{7}{8}}$		$\left ( a^{\frac{3}{4}} \right )^{5}$


	787.		788.

	$\left ( b^{-\frac{5}{6}} \right )^{12}$		$\left ( 2a^{-\frac{1}{2}}\, b^{\frac{3}{4}} \right )^{6}$


	789.		790.

	$\left ( a^{\frac{2}{3}} \right )^{\frac{3}{2}}$		$\sqrt[3]{a^{\frac{2}{3}}}$


	791.		792.

	$\sqrt{b^{-\frac{3}{4}}}$		$\sqrt[3]{a^{\frac{2}{5}}\, b^{-2}}$