3/a+b=a/b+c=b/a+c=k则K的值
问题描述:
3/a+b=a/b+c=b/a+c=k则K的值
答
c/(a+b)=a/(b+c)=b/(a+c)=k(a+b)/c=(b+c)/a=(a+c)/b=1/k1+(a+b)/c=1+(b+c)/a=1+(a+c)/b=1+1/k(a+b+c)/c=(a+b+c)/a=(a+b+c)/b=(k+1)/ka+b+c=0,或,a=b=ca+b+c=0时,(k+1)/k=0,k=-1a=b=c时,k=c/(a+b)=c/2c=1/2所以,k=-1,...