You're absolutely right! I meant it the other way around:
As x approaches 0, log(x) goes to minus infinity.
I think that's what he means (the next sentence about "visualiz[ing] very small values of a function by expanding their range" makes sense in that context), but I agree it is not very clear.
As x approaches 0, log(x) goes to minus infinity.
I think that's what he means (the next sentence about "visualiz[ing] very small values of a function by expanding their range" makes sense in that context), but I agree it is not very clear.