Mohon bantuan no 14 dan 15

Mohon bantuan no 14 dan 15

Jawaban Terkonfirmasi

$14) sqrt{1 + (frac{ x^{4} - 1}{2 x^{2} } )^{2} } = sqrt{1 + frac{ x^{8} - 2 x^{4} + 1}{4 x^{4} } }$

   $= sqrt{ frac{4 x^{4} + x^{8} - 2 x^{4} + 1}{4 x^{4} } }$

   $= sqrt{ frac{ x^{8} + 2 x^{4} + 1}{4 x^{4} } }$

   $= sqrt{ frac{ (x^{4} + 1)^{2} }{4 x^{4} } }$

   $= frac{ x^{4} + 1}{2 x^{2} }$
jawaban : B

$15) ( sqrt[3]{ sqrt[6]{ a^{9} } } )^{4} ( sqrt[6]{ sqrt[3]{ a^{9} } } )^{4} = (a^{ frac{9}{18} }) ^{4} . (a^{ frac{9}{18} }) ^{4}$

= $(a^{ frac{9}{18} } )^{8}$

$= a^{ frac{72}{18} }$

$= a^{4}$
jawaban : D