(1)∵ABCD为矩形,AF⊥AE,AB⊥CF
∴AE^2=AD^2+DE^2=9+x^2
AF^2=AB^2+BF^2=16+y^2
∵AE^2+AF^2=EF^2=CE^2+CF^2
∴9+x^2+16+y^2=(4-x)^2+(3+y)^2
解方程得y=(4/3)x,函数的定义域:0
(1)∵ABCD为矩形,AF⊥AE,AB⊥CF
∴AE^2=AD^2+DE^2=9+x^2
AF^2=AB^2+BF^2=16+y^2
∵AE^2+AF^2=EF^2=CE^2+CF^2
∴9+x^2+16+y^2=(4-x)^2+(3+y)^2
解方程得y=(4/3)x,函数的定义域:0