Is -LSB- math -RSB- f -LRB- x -RRB- = \ mathrm -LCB- e -RCB- ^ -LCB- \ frac -LCB- 1 -RCB- -LCB- x -RCB- -RCB- -LSB- / math -RSB- at -LSB- math -RSB- x = 0 -LSB- / math -RSB- a continuous or discontinuous function ?
Is the function -LSB- math -RSB- f -LRB- x -RRB- = \ frac -LCB- x ^ 2 -- 16 -RCB- -LCB- x +4 -RCB- -LSB- / math -RSB- discontinuous at -LSB- math -RSB- x = -4 -LSB- / math -RSB- ?