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Tuesday, December 21, 2021

Latihan Soal Exponen Bag 1

 1. Dalam bentuk pangkat positif, \frac{x^{-2}-y^{-2}}{(xy)^{-2})}=

Penyelesaian:
\frac{x^{-2}-y^{-2}}{(xy)^{-2})}=(xy)^2\left ( \frac{1}{x^2}-\frac{1}{y^2} \right )
=\left ( x^2y^2 \right )\left ( \frac{y^2-x^2}{x^2y^2} \right )
=-\left ( x^2-y^2 \right )
=-(x+y)(x-y)

2. Jika f(x)=2^{2x}+2^{x+1}-3 dan g(x)=2^x+3 maka \frac{f(x)}{g(x)}= .........
Penyelesaian:
\frac{f(x)}{g(x)}=\frac{(2^x)^2+2^1.2^x-3}{2^x+3}
=\frac{(2^x+3)(2^x-1)}{(2^x+3)}
=2^x-1
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