共50条信息
如图,直线\(y=\dfrac{1}{2}x+2\)与\(y\)轴交于点\(A\),与直线\(y=-\dfrac{1}{2}x\)交于点\(B\),以\(AB\)为边向右作菱形\(ABCD\),点\(C\)恰与原点\(O\)重合,抛物线\(y=(x-h)^{2}+k\)的顶点在直线\(y=-\dfrac{1}{2}x\)上移动\(.\)若抛物线与菱形的边\(AB\)、\(BC\)都有公共点,则\(h\)的取值范围是\((\) \()\)
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