How do I solve -LSB- math -RSB- \ lim _ -LCB- x \ rightarrow 0 -RCB- \ left | \ frac -LCB- x +1 -RCB- -LCB- x-1 -RCB- \ right | -LSB- / math -RSB-
How do I solve -LSB- math -RSB- \ frac -LCB- d -RCB- -LCB- dx -RCB- \ left -LRB- \ log \ left -LRB- \ frac1 -LCB- x +1 -RCB- \ right -RRB- \ right -RRB- -LSB- / math -RSB- ?