猜测关于x、y的方程组 (m+2)x+(m+1)y=m (n+2)x+(n+1)y=n m不等于n 求x、y 的值
问题描述:
猜测关于x、y的方程组 (m+2)x+(m+1)y=m (n+2)x+(n+1)y=n m不等于n 求x、y 的值
答
(m+2)x+(m+1)y=m -----------(1)(n+2)x+(n+1)y=n ------------(2)(1)*(n+2)-(2)*(m+2) 得:((m+1)(n+2)-(n+1)(m+2))y=m(n+2)-n(m+2)y=(m(n+2)-n(m+2))/((m+1)(n+2)-(n+1)(m+2))=2(1)*(n+1)-(2)*(m+1) 得:((m+2)(n+1...