In Exercises 19 - 22, determine if f is continuous at the indicated values. If not, explain why.

19. F(x) = sinx

x=0

x>0

(a) x=0

(b) x=7

x< 1

x> 1

f(x) = { x - x

14-18-2

(a) x=0

(b) x=1 I

21. F(x) = { ****

X +5x+4

x2+3x+2

**-1

3

(a) x = -1

(b) x = 10

22. 819) = {

x² – 64

x2 - 11x+24

Oo oo

5

(a) x=0

(b) x = 8