Question

Estimate the limit numerically.
lim 3xe^−7x
x→+infinity

Answer 1

put in 100000000000 for x and see what you get

Answer 2

I get 0 but the system says that is not correct

Answer 3

what system?

Answer 4

my homework system

Answer 5

its wrong then, we can use l'hospital rule and get 3/(7e^(7x)) and then it goes to 0

Answer 6

what does your book say it is?

Answer 7

the other problem was DNE but this one is not allowing that option either

Answer 8

you sure its not as x goes to negative infinity?

Answer 9

and 0 is not the same as does not exist btw

Answer 10

no its positive I know but I was tried a number of options based on other examples

Answer 11

well the answer is 0, you can check on wolfram or your calculator or many other places. The book is wrong ...it happens

Answer 12

I appreciate it. I thought I was loosing my mind!!