Why does -LSB- math -RSB- \ frac -LCB- \ frac -LCB- d -RCB- -LCB- dx -RCB- x -RCB- -LCB- x -RCB- = \ frac -LCB- 1 -RCB- -LCB- x -RCB- -LSB- / math -RSB- ?
What is the derivative of -LSB- math -RSB- x ^ x -LSB- / math -RSB- ?