- Joined
- Sep 19, 2009
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Hi,
So one question in the math section regarding limits: (I read the explanation, but pardon my stupidity, I still don't understand)
What is :
lim (x-> 1-) |x-1| / x-1 ?
The answer was -1. So... x-> 1- means x is approaching from below 1 right ? (as in x < 1)? The explanation of the question said that since x is less than 1,
x-1 must be negative. And so |x-1| = -(x-1) . But how can an absolute value of something be a negative?? If (x-1) is negative |x-1| should still be positive right??
T_T
I don't get it.
So one question in the math section regarding limits: (I read the explanation, but pardon my stupidity, I still don't understand)
What is :
lim (x-> 1-) |x-1| / x-1 ?
The answer was -1. So... x-> 1- means x is approaching from below 1 right ? (as in x < 1)? The explanation of the question said that since x is less than 1,
x-1 must be negative. And so |x-1| = -(x-1) . But how can an absolute value of something be a negative?? If (x-1) is negative |x-1| should still be positive right??
T_T
I don't get it.