Functions involving radicals and how to find its limit of a radical function using the conjugate value, also tell basic knowledge about radical functions for basic calculus

3. F(x)= 𝑥

4. f(x)=2 𝑥
f(x)=0.2 𝑥
f(x)= 𝑥

5. f(x)= 𝑥
f(x)=- 𝑥

12. 𝑓 𝑥 = 𝑥 − 3. find lim
𝑥→9
𝑥 − 3
lim
𝑥→9
𝑥 − 3= lim
𝑥→9
𝑥 − lim
𝑥→9
− 3
= 9 − 3
= 0