
Natural log problem
I am doing a flight control module at university, and maths has never been a strong point of mine.
My problem is:
y(t)=k(1e^t/T)
Where y(t)=0.5, k=6/17 and T=1/17
So i can get to this point:
(0.5)17/6 = 1e^17t
But obviously if i go any further i am going to have to take natural log of a negative number which obviously cannot be done and i dont know anyway around it.
Any help would be great
Thanks

The supremum of 1  e^(t/T) is 1 (see this graph, which approaches 1 very fast because of the large factor of 17). So, the supremum of y(t) is 6/17 < 0.5, which means that there are no solutions.