ta có:\(\frac{a}{k}=\frac{x}{a}\Rightarrow a.a=k.x\)(1)
\(\frac{b}{k}=\frac{y}{b}\Rightarrow b.b=k.y\)(2)
từ (1) và (2) => a2=kx; b2=ky
từ đó tự suy ra ...
Cho\(\frac{a}{k}=\frac{x}{a}\); \(\frac{b}{k}=\frac{y}{b}\). Chứng minh rằng \(\frac{a^2}{b^2}=\frac{x}{y}\)
cho \(\frac{a}{k}=\frac{x}{a};\frac{b}{k}=\frac{y}{b}.\) chứng minh : \(\frac{a^2}{b^2}=\frac{x}{y}\)
cho \(\frac{a}{k}=\frac{x}{a};\frac{b}{k}=\frac{y}{b}\)
chứng minh \(\frac{a^2}{b^2}=\frac{x}{y}\)
cho \(\frac{a}{k}=\frac{x}{a};\frac{b}{k}=\frac{y}{b}\)
chứng minh \(\frac{a^2}{b^2}=\frac{x}{y}\)
\(Cho:\frac{a}{k}=\frac{x}{a}và\frac{b}{k}=\frac{y}{b}.CMR:\frac{a^2}{b^2}=\frac{x}{y}\)
cho \(\frac{K}{x}=\frac{a}{c};\frac{K}{y}=\frac{b}{d};c+d=K\). Chứng minh ax + by = k2
cho \(\frac{a}{k}=\frac{x}{a}\); \(\frac{b}{k}=\frac{y}{b}\)
CMR:\(\frac{a^2}{b^2}=\frac{x}{y}\)
Cho\(\frac{a}{k}\) ;\(\frac{b}{k}=\frac{y}{b}\) CMR : \(\frac{a^2}{b^2}=\frac{x}{y}\)
cho \(\frac{k}{x}=\frac{a}{c};\frac{k}{y}=\frac{b}{d}\left(c+d=k\right)\)
chứng minh ax+by = \(k^2\)
