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

Question

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

zzr0ck3r · Answer

put in 100000000000 for x and see what you get

anonymous · Answer

I get 0  but the system says that is not correct

zzr0ck3r · Answer

what system?

anonymous · Answer

my homework system

zzr0ck3r · Answer

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

zzr0ck3r · Answer

what does your book say it is?

anonymous · Answer

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

zzr0ck3r · Answer

you sure its not as x goes to negative infinity?

zzr0ck3r · Answer

and 0 is not the same as does not exist btw

anonymous · Answer

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

zzr0ck3r · Answer

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

anonymous · Answer

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