若2x=3y,则(x*x+y*y)/x*x=?
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若2x=3y,则(x*x+y*y)/x*x=?若2x=3y,则(x*x+y*y)/x*x=?若2x=3y,则(x*x+y*y)/x*x=?y/x=2/3(x^2+y^2)/(x^2)=1+(y/x)^
若2x=3y,则(x*x+y*y)/x*x=?
若2x=3y,则(x*x+y*y)/x*x=?
若2x=3y,则(x*x+y*y)/x*x=?
y/x=2/3
(x^2+y^2)/(x^2)=1+(y/x)^2=1+(2/3)^2=13/9
y=2x/3
所以y²=4x²/9
所以圆上=(x²+4x²/9)/x²
=(13x²/9)/x²
=13/9
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