# Limit supreme solve i am not able to

1. Sep 16, 2007

### rishikesh86

limit supreme...plz solve i am not able to

$$\limsup{t\rightarrow {\infty}} \int{p(s)ds} >1$$
and limit of integral are $$t-\tau$$ to $$t$$ where
$$\tau$$>0

plz solve i am not able to

2. Sep 16, 2007

### rishikesh86

please ane body help me

3. Sep 16, 2007

### HallsofIvy

It bothers you that someone did not answer in 4 minutes. We are not payed to sit at computers waiting to answer questions you know!

In any case, what exactly is your question? Obviously the limit will depend on exactly what p(t) is!

4. Sep 17, 2007

### rishikesh86

sorry bt the quetion was given exactly asit is to me as an assignment

5. Sep 17, 2007

### Emmanuel114

For what class?

6. Sep 18, 2007

### rishikesh86

for maths class, i am in an technical college 2nd year

7. Sep 18, 2007

### rishikesh86

plz help me

8. Sep 18, 2007

### HallsofIvy

There is no help we can give without knowing p! For example,
$$\int_{t-\tau}^t \frac{1}{t}dt= ln(t)-ln(t-\tau)= ln\left(\frac{t}{t-\tau}\right)= ln\right(\frac{1}{1-\frac{\tau}{t}}\right)$$
which has limit ln(1)= 0 as t goes to infinity but
$$\int_{t-\tau}^t t dt= \frac{1}{2}(t^2- (t-\tau)^2= \frac{1}{2}(-2t\tau +\tau^2)$$
which has no limit as t goes to infinity.

9. Sep 21, 2007

### rishikesh86

thanx for the help

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