# Thread: How can I proove this?

1. ## How can I prove:

That there exists an x such that 3^x=x^2.

(Thanks for responding to my obvious question)

2. Hint - Let f(x) = 3^x - x^2
1. f(x) is continous
2. what is f(-1) and f(0)

Cna you take it from here?

3. Lovely! krtica, aman_cc's point is that you are NOT asked to find such an x, just prove that it exists.

4. It is against the rules to remove the OP. See Rule # 7. If you don't restore the original question, a mod will do that for you and you'll get an infraction.

You've been warned.