如題,,真係好急~唔該幫幫手!!
1.f(x)=(x+3)(x+2)-k^2及f(k)=2k
a.求k
b.若2x-f(x)=0,求x
2.f(x)=x^2-kx
a.以k表示f(x+2),f(x-2)
b.若f(x+2)-f(x-2)=kx-32,求k
c.若f(x+2)=f(x-2)+40,求x
3.f(x/2)=3x/2+5
a.求f(1),f(2)
b.求f(u)
4.f(2x)=x^2+3x-4
a.求f(2),f(4)
b.求f(x)