For large x: exponential growth dominates polynomial growth. That is, $a^x$ grows faster than $x^n$ for any fixed n when a > 1. Conversely, log functions grow slower than any positive power: log(x) < $x^{epsilon}$ for large x. In JEE, this helps in comparing terms and finding limits. Also: among exponentials, the one with the larger base dominates (3^x >> 2^x for large x).