共50条信息
若实数\(x\),\(y\)满足\(x^{2}-4xy+4y^{2}+4x^{2}y^{2}=4\),则当\(x+2y\)取得最大值时,\(\dfrac{x}{y}\)的值为____\(.\)
函数\(f\)\((\)\(x\)\()=\cos 2\)\(x\)\(+6\cos \left( \dfrac{π}{2}-x\right) \)的最大值为 .
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