Question

.若规定a*b=(a+1)(b+4)-(a+2)(b+3),请化简(m+1)*(n-1),请化简(m+1)*(n-1),

Answer 1

(m+1)*(n-1)

=(m+1+1)(n-1+4)-(m+1+2)(n-1+3)

=(m+2)(n+3)-(m+3)(n+2)

=3(m-n)-2(m-n)

=m-n

m-n=2006-2005=1