差分方程的递推解法，对于一个差分方程，如果能找出这样的数列通项，将它带入差分方程后，该方程成为恒等式，这个通项叫做差分方程的解。 -Recursive solution of differential equations, for a difference equation, if we can find this series passed it into the differential equation, the equations become identities, the ge