What are the zeros of the function? Plot the function y = (x + 3) (x-3) (x-4)

Determine whether each of these functions is a bijection from R to R.

a) $f(x)=-3x+4$

b) ${\displaystyle f\left(x\right)=-3x^2+7}$

c) $f(x)=\frac{x+1}{x+2}$
${\displaystyle d)f\left(x\right)=x^5+1}$

Find the linear approximation of the function $f(x)=\sqrt{1-x}$ at $a=0$ and use it to approximate the numbers $\sqrt{0.9}$ and $\sqrt{0.99}$.

If f$(x)=x+4$ and ${\displaystyle g\left(x\right)=4x²}$, find $(f+g)(x)and(f+g)(2).$

Classify each function:
a) ${\displaystyle f\left(x\right)=\log 4\left(x\right)}$
b) ${\displaystyle g\left(x\right)=\sqrt[5]{x}}$
c) ${\displaystyle h\left(x\right)=2\frac{x^3}{9–x^2}}$
d) ${\displaystyle u\left(t\right)=1–1.1t_{2.52}{t}^2}$
e) ${\displaystyle v\left(t\right)=3^t}$
f) $w(\theta )=\sin \theta {\cos }^7\theta$

F(x)=(1+x2