1. no real roots
2. no negative real root
3. odd number of real roots
4. at least one positive and one negative real root
at least one positive and one negative real root
1. u(t)
2. t u(t)
3. t2/2 u(t)
4. e –t u(t)
t u(t)
1. 0.5s+1/s+1
2. 3s+6/s+2
3. s+2/s+1
4. s+2/s+1
s+2/s+1
1. 3
2. 4
3. 5
4. 7
5
1. 1.22 and 0.1
2. 0.81 and 0.1
3. −1.22 and 0.1
4. 2.44 and 0.2
1.22 and 0.1
1. e-πf2
2. e-πf2/2
3. e-πf?
4. e-2πf2
e-2πf2
1. 4/9
2. 1/2
3. 2/3
4. 5/9
1/2
1. 2
2. 5
3. 8
4. 16
5
1. 100
2. 800
3. 800
4. 100
800<90?
1. 1
2. 5
3. 10
4. 100
10