limit x->infinity exp(x)-x^10
Let's evaluate the limit of exp(x) -x10 when x+∞
The limit of exp(x) is +∞ when x+∞
The limit of -x10 is -∞ when x+∞
For exp(x) -x10, the limit takes the indeterminate form +∞ + -∞ when x+∞
By comparative growth, exp(x) grows faster than x10 as x+∞:
So the limit of exp(x) -x10 is +∞ when x+∞
Answer:   +∞