Question

Si P(x)=x^2, calcular P(x+1)+P(x-1)/x^2+1

Answer 1

P= x²
P(x+1)+P(x-1)/x²+1
x²(x+1)+x²(x-1)/x²+1
x³+x²+x³-x²/x²+1
x³+x³-x²+1 x²/x² da 1
entonces
x³+x³-x²+1+1
2x³-x²+2