ساده شدهی عبارت $\sqrt{a\sqrt[4]{2a\sqrt[8]{4a}}}\times \sqrt[8]{a\sqrt[4]{2a\sqrt{4a}}}$ کدام است؟
1 )
${{2}^{\frac{5}{32}}}\times {{a}^{\frac{15}{16}}}$
2 )
${{2}^{\frac{5}{32}}}\times {{a}^{\frac{15}{16}}}$
${{2}^{\frac{7}{32}}}\times {{a}^{\frac{13}{16}}}$
4 )
${{2}^{\frac{9}{32}}}\times {{a}^{\frac{11}{16}}}$