定义新运算:x△y=(1/xy)+(1/x+1)+(1/y+m),已知2△1=4/3求:2007△2008的值.(m=1)的确错了 x△y=(1/xy)+{1/(x+1)}+{1/(y+m)}条件同上 3q
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![定义新运算:x△y=(1/xy)+(1/x+1)+(1/y+m),已知2△1=4/3求:2007△2008的值.(m=1)的确错了 x△y=(1/xy)+{1/(x+1)}+{1/(y+m)}条件同上 3q](/uploads/image/z/546135-15-5.jpg?t=%E5%AE%9A%E4%B9%89%E6%96%B0%E8%BF%90%E7%AE%97%EF%BC%9Ax%E2%96%B3y%3D%281%2Fxy%29%2B%281%2Fx%2B1%29%2B%281%2Fy%2Bm%29%2C%E5%B7%B2%E7%9F%A52%E2%96%B31%3D4%2F3%E6%B1%82%EF%BC%9A2007%E2%96%B32008%E7%9A%84%E5%80%BC.%EF%BC%88m%3D1%29%E7%9A%84%E7%A1%AE%E9%94%99%E4%BA%86+x%E2%96%B3y%3D%281%2Fxy%29%2B%7B1%2F%28x%2B1%29%7D%2B%7B1%2F%28y%2Bm%29%7D%E6%9D%A1%E4%BB%B6%E5%90%8C%E4%B8%8A+3q)
定义新运算:x△y=(1/xy)+(1/x+1)+(1/y+m),已知2△1=4/3求:2007△2008的值.(m=1)的确错了 x△y=(1/xy)+{1/(x+1)}+{1/(y+m)}条件同上 3q
定义新运算:x△y=(1/xy)+(1/x+1)+(1/y+m),已知2△1=4/3求:2007△2008的值.(m=1)
的确错了 x△y=(1/xy)+{1/(x+1)}+{1/(y+m)}条件同上 3q
定义新运算:x△y=(1/xy)+(1/x+1)+(1/y+m),已知2△1=4/3求:2007△2008的值.(m=1)的确错了 x△y=(1/xy)+{1/(x+1)}+{1/(y+m)}条件同上 3q
X▲Y=1/XY+1/X+1+1/Y+m
2▲1=1/2+1/2+1+1+m=4/3
m=-5/3
2007▲2008=1/(2007*2008)+1/2007+1+1/2008-5/3
=1/2007-1/2008+1/2007+1+1/2008-5/3
=2/2007-2/3
=-1336/2007
题目有问题,你抄错了吧!再仔细看看。
等于4032063分之4016
X▲Y=1/XY+1/X+1+1/Y+m
2▲1=1/2+1/2+1+1+m=4/3
m=-5/3
2007▲2008=1/(2007*2008)+1/2007+1+1/2008-5/3
=1/2007-1/2008+1/2007+1+1/2008-5/3
=2/2007-2/3
=-1336/2007 别抄错