1.5 Lösning 1b
Från Mathonline
\( \displaystyle {{2\,x^{-5} \over 3\,x^{-8}} \cdot (2\,x)^{-1} = {2\,x^{-5-(-8)} \over 3} \cdot (2\,x)^{-1} = {2\,x^{-5+8} \over 3} \cdot (2\,x)^{-1} = } \)
\( \displaystyle {= {2\,x^3 \over 3} \cdot (2\,x)^{-1} = {2\,x^3 \over 3} \cdot {1 \over 2\,x} = {2\,x^3 \cdot 1 \over 3 \cdot 2\,x} = {x^2 \over 3} } \)
