已知函数y=f(n),满足f(2)=4,且f(n)=nf(n-1),n属于N+.求:f(3),f(4),f(5)
问题描述:
已知函数y=f(n),满足f(2)=4,且f(n)=nf(n-1),n属于N+.求:f(3),f(4),f(5)
答
f(3)=3f(2)=12 f(4)=4f(3)=48 f(5)=5f(4)=240
已知函数y=f(n),满足f(2)=4,且f(n)=nf(n-1),n属于N+.求:f(3),f(4),f(5)
f(3)=3f(2)=12 f(4)=4f(3)=48 f(5)=5f(4)=240