Limits can be written to describe the behavior of a function as the value of 'x' approaches a value from a positive or negative direction. We can also solve for a limit as the function approaches from each direction. When evaluating a limit from the left, we are approaching the limit from the left with increasing values of 'x'. This is written as:
lim x c - f(x)
In this example, we evaluate
lim x 2 - x + 4 x - 2
One-sided infinite limits from negative direction
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