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Review Exercises for Chapter 3 257<br />
13.<br />
fx 6 x<br />
14.<br />
f x 0.3 x1 3 10 x1 15.<br />
gx 1 6 x<br />
Intercept:<br />
0, 1<br />
Horizontal asymptote:<br />
y 0<br />
Intercept:<br />
0, 2<br />
Horizontal asymptote: x-axis<br />
Intercept:<br />
0, 0.3<br />
Horizontal asymptote: y 1<br />
Increasing on:<br />
, <br />
Decreasing on , <br />
Decreasing on:<br />
, <br />
y<br />
y<br />
y<br />
4<br />
3<br />
2<br />
7<br />
6<br />
5<br />
4<br />
3<br />
7<br />
6<br />
5<br />
1<br />
–2 –1 1 2<br />
x<br />
2<br />
1<br />
−4 −3 −2 −1<br />
−1<br />
1 2 3 4<br />
x<br />
2<br />
1<br />
−2 −1 1 2 3 4 5 6<br />
−1<br />
x<br />
16.<br />
gx 0.3 x<br />
y<br />
x 2 1 0 1 2<br />
y 0.09 0.3 1 3 1 3 11 1 9<br />
4<br />
3<br />
2<br />
1<br />
–2 –1 1 2<br />
x<br />
17.<br />
y 18.<br />
y 19.<br />
y<br />
9<br />
8<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
−5 −4 −3 −2 −1 1 2 3 4 5<br />
x<br />
9<br />
8<br />
7<br />
6<br />
2<br />
1<br />
−7 −6 −5 −4 −3 −2 −1 1 2 3<br />
x<br />
−5 −4 −3 −2 1 2 3 4 5<br />
−2<br />
−3<br />
−4<br />
−5<br />
−6<br />
−7<br />
−8<br />
−9<br />
x<br />
hx e x1<br />
fx e x2<br />
hx e x<br />
© Houghton Mifflin Company. All rights reserved.<br />
20.<br />
Horizontal asymptote: y 0<br />
5<br />
4<br />
3<br />
2<br />
−5 −4 −3 −2 1 2 3 4 5<br />
−2<br />
−3<br />
−4<br />
−5<br />
fx 3 e x<br />
y 21.<br />
Horizontal asymptote: y 3<br />
x<br />
Horizontal asymptote: y 0<br />
9<br />
8<br />
7<br />
4<br />
3<br />
2<br />
1<br />
y 22.<br />
−2 −1 1 2 3 4 5 6 7 8<br />
fx 4e 0.5x<br />
Horizontal asymptote: y 0<br />
x<br />
Horizontal asymptote: y 0<br />
−9 −8 −7 −6 −5 −4 −3 −2 −1 1<br />
fx 2 e x3<br />
9<br />
8<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
Horizontal asymptote: y 2<br />
y<br />
x