Diketahui p(x) = 4x3 – 2x2 + 1 dan q(x) = x4 – nx2 + 2. Jika r(x) = p(x) – q(x) dan r(2) = 39 maka n = …

r(x)=4x^3-2x^2+1-(x^4-nx^2+2=39
=-x^4+4x^3+nx^2-2x^2+1-2=39
=-x^4+4x^3+nx^2-2x^2-1=39
r(2)=(-2)^4+4(2)^3+n(2)^2-2(2)^2-1=39
=16+32+4n-8-1=39
=4n+39=39
4n=0
n=0