The pole and zero of a system are at s=-10 and s=-7 respectively. If gain factor is 5. The transfer function is

The pole and zero of a system are at s=-10 and s=-7 respectively. If gain factor is 5. The transfer function is:

1. 5(s-10)/(s-7)
2. 5(s+10)/(s+7)
3. (1/5)*{(s-10)/(s-7)}
4. (1/5)*{(s+10)/(s+7)}

Correct answer: 2. 5(s+10)/(s+7)