- #1
tigigi
- 38
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1. I this from my homework solution.
(1-t/s)^n = exp(-t/s)
as n goes to infinity
I don't understand. I checked the exponential power series. It should be :
exp(x) = summation (x^n / n!)
n=0 to infinity
How come it could be a exponential function ?
2. another is that why
<t> = integral from 0 to infinity (t*P(t) dt) ?
average t
P(t)dt = probability that an electron has no colission till time t *
probability that it has a collision between time t
probablitiy has no collision is exp(-t/s)
t+dt = exp(-t/s) *dt/s
Thanks a lot !
(1-t/s)^n = exp(-t/s)
as n goes to infinity
I don't understand. I checked the exponential power series. It should be :
exp(x) = summation (x^n / n!)
n=0 to infinity
How come it could be a exponential function ?
2. another is that why
<t> = integral from 0 to infinity (t*P(t) dt) ?
average t
P(t)dt = probability that an electron has no colission till time t *
probability that it has a collision between time t
probablitiy has no collision is exp(-t/s)
t+dt = exp(-t/s) *dt/s
Thanks a lot !