作业帮设f(x)f(y)=4 g(x)g(y)=8 求g(x+y)/g(x-y)值要过程谢谢
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设f(x)f(y)=4 g(x)g(y)=8 求g(x+y)/g(x-y)值要过程谢谢
设f(x)f(y)=4 g(x)g(y)=8 求g(x+y)/g(x-y)值
要过程谢谢
设f(x)f(y)=4 g(x)g(y)=8 求g(x+y)/g(x-y)值要过程谢谢
F(x)F(y)=(eX—e-X)(eY—e-Y)=e(X+Y)—e(X-Y)-[e-(X-Y)]+e-(X+Y)=g(x+y)-g(x-y)=4
g(x)g(y)=e(X+Y)+e(X-Y)+[e-(X-Y)]+e-(X+Y)=g(x+y)+g(x-y)=8
g(x+y)-g(x-y)=4 g(x+y)+g(x-y)=8
g(x+y)=6 g(x-y)=2 g(x+y)除以g(x-y) =3
设f(x)f(y)=4 g(x)g(y)=8 求g(x+y)/g(x-y)值要过程谢谢
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