Is E2x power + 1 equivalent infinitesimal 2x or 2x + 2

Is E2x power + 1 equivalent infinitesimal 2x or 2x + 2

If you want to be equivalent to infinitesimal, first you need to be infinitesimal (the limit is 0), so you need to explain that when x tends to that value, it is infinitesimal. E2x power + 1 is the exponent of E is 2x + 1, or the exponent of E is 2x, then e ^ (2x + 1) → 0 when x → - ∞ is infinitesimal, and when x → - ∞, no matter 2x or 2x + 2 is not infinitesimal
If it is e ^ (2x) + 1, then this function can't approach 0, it can't be infinitesimal