Check your signs - the formula should have Q(t) decreasing with time, not increasing. You should have:
If you set t to infinity you get:
Set to determine the minimum value of k in terms of and that satisfies the condition.
Check your signs - the formula should have Q(t) decreasing with time, not increasing. You should have:
If you set t to infinity you get:
Set to determine the minimum value of k in terms of and that satisfies the condition.