Expand each of these as an exponential sereis for the first 4 terms:
1. e2x
2. e-x
3. ex+1
4. 2e3x
5. e0.5x
6. -e-5x
7. ex (1 + x)
8. (2 − x) ex
Evaluate each of these to 4 decimal places using the first six terms of the exponential series:
9. e2
10. e-1
11. √e
12. 1 / √e