in the definition (3.17.1) of the
dual q-Krawtchouk polynomials and take the limit 
we simply find
the Krawtchouk polynomials given by (1.10.1) :
If we set in the definition (3.17.1) of the
dual q-Krawtchouk polynomials and take the limit we simply find
the Krawtchouk polynomials given by (1.10.1) :
