3.1 Definition of derivatives; Questions 11-20

[Eigenvalue]

Find the slope of the tangent line and the equation of a tangent line to f at x=a

11. f(x)=3-4x, a=2
12. f(x)=[tex]\frac{x}{5}[/tex]+6, a=-1
13. f(x)=x²+x, a=1
14. f(x)=1-x-x², a=0
15. f(x)=[tex]\frac{7}{x}[/tex], a=3
16.f(x)=[tex]\sqrt{x+8}[/tex], a=1
17. f(x)=2-3x², a=-2
18. f(x)=[tex]\frac{-3}{x-1}[/tex], a=4
19. [tex]\frac{2}{x+3}[/tex], a=-4
20. [tex]\frac{3}{x²}[/tex], a=3