Question 876317
<img src="http://www.sciweavers.org/tex2img.php?eq=%20%5Csqrt%5B7%5D%7Ba%5E2b%5E4%7D%20%3D%20%5Cleft%28a%5E2b%5E4%5Cright%29%5E%7B1%2F7%7D&bc=White&fc=Black&im=jpg&fs=18&ff=arev&edit=0" align="center" border="0" alt=" \sqrt[7]{a^2b^4} = \left(a^2b^4\right)^{1/7}" width="242" height="46" />