0 X L1m1t--, D 22 1. Tokens from the Gods and it is not obvious, at first, how this is to be done. 2 + x and the denominator x also approach 0. What is to be done? What is to be done is to realize that the question raised in Example 5 is exactly the same as the question raised in Example 4, whose answer, we have seen, is 1. Why are these two question exactly the same? Because Lim Fat 0, remember, is to be found by letting x tend to 0, but never allowing x to equal 0.
Special functions: an introduction to classical functions of mathematical physics by Nico M. Temme