– 5
– 10
– 102
– 103
– 10n
From the Table 5 2, we deduce that the
value of f(x) may be made smaller than any
given number by choosing a negative real
number very close to 0 In symbols,
we write
lim0
( )
x
f x
→−
= − ∞
(to be read as: the left hand limit of f (x) at 0 is
minus infinity) Again, we wish to emphasise
that – ∞ is NOT a real number and hence the
left hand limit of f at 0 does not exist (as a real
number)