+ For 1)
We cannot see the formula of h(x)
b) g(-2)= 3*(-2)²=12
c) f^-1(x)=1/f(x)=1/(2x+1)
d) fog(x) = f(3x²)=2*3x²+1= 6x²+1
+ For 2) Find the domain of
a) For all x∈R
b) For all x∈R
c) We need 3x-1≥0 or x≥1/3 x∈[1/3, +∞)
d) We need 2x-1≠0 or x≠1/2 and x∈R\{1/2}
+ For 3)
(x+4)^4= x^4+ 4*x³*4+6*x²*4²+4*x*4³+4^4= x^4+ 16x³+ 96x²+256x+256
