I don't think you can do that unless the exponents x are integers, which it doesn't specify. I tried differentiating to show that so and so was a minimum, but that didn't get me anywhere :cry:
This appeared on a nature of proof topic test btw :skip:.
I don't have access to the solution.
Edit: I ended up proving it using induction and manipulation of the bounds
Yeah after reading through some replies I've decided to just do ext 2, see how it goes and then decide whether to keep it or not. But yeah, just like you, I'm conflicted about what I should drop. I'm thinking of dropping either music 2 or chemistry, but I guess I'll just see what my prelim...
I'm in year 11 right now, starting year 12 next term. I'm really stuck on whether or not I should do extension 2 maths, and the application deadline is next Friday. So far in extension 1, I've done well, ranking 2/43 with the help of an external tutoring firm. However, because of financial...