1.2 Lösning 7
Från Mathonline
\( U_5(x) = 2\,x\,\cdot\,U_4(x)\,-\,U_3(x) = 2\,x\,\cdot\,(16\,x^4\,-\,12\,x^2\,+\,1)\,- \)
- \[ \,-\,(8\,x^3\,-\,4\,x) = 32\,x^5\,-\,24\,x^3\,+\,2\,x\,-\,8\,x^3\,+\,4\,x = \]
- \[ = 32\,x^5\,-\,32\,x^3\,+\,6\,x \]
