(oo=inf)

Limx-->+oo (5^x - 7^x)

Guest Jan 16, 2016

#1**+5 **

Believe or not, when I plug it into my computer software, it comes back with this succinct message:

(no interesting limit points found)

Guest Jan 16, 2016

#2**+10 **

Best Answer

Here's a graphical solution: https://www.desmos.com/calculator/f7c6wqsvxl

Note....as x grows larger and larger, the value of 7^x is much greater than 5^x......so......this function approaches [ -inf ] as x grows sufficiently large

Thus......the limit does not exist

CPhill
Jan 16, 2016