若(a的m1次幂*b的n+2次幂)*(a的2n-1次幂*b的2m次幂)=a的5次幂*b的3次幂,求m+n的值
问题描述:
若(a的m1次幂*b的n+2次幂)*(a的2n-1次幂*b的2m次幂)=a的5次幂*b的3次幂,求m+n的值
刚发错了,题目是若(a的m+1次幂*b的n+2次幂)*(a的2n-1次幂*b的2m次幂)=a的5次幂*b的3次幂,求m+n的值
答
[a^(m+1)*b^(n+2)]*[a^(2n-1)*b^2m]=a^5b^3a^(m+1)*b^(n+2)*a^(2n-1)*b^2m=a^5b^3a^(m+1)*a^(2n-1)*b^(n+2)*b^2m=a^5b^3a^[(m+1)+(2n-1)]b^(n+2+2m)=a^5b^3a^(m+2n)b^(n+2+2m)=a^5b^3m+2n=5n+2+2m=3解得m=-1n=3m+n=-...