1.4 Lösning 2c
Från Mathonline
\( \, h(x) = \) \( {x^3 - x^2 - 1 \over x^3 + x^2 + x} \)
\( h(-1) = \) \( {(-1)^3\,-\,(-1)^2\,-\,1 \over (-1)^3\,+\,(-1)^2\,+\,(-1)} \) \( = \) \( {(-1)\,-\,1\,-\,1 \over (-1)\,+\,1\,+\,(-1)} \) \( = \) \( {-3 \over -1\,+\,1\,-\,1} \) \( = \) \( {-3 \over -1} \) \( = 3 \)
