当k取任意实数时,抛物线y=½(x-k)²+k²的顶点所在曲线是( )A,y=x² b,y=-x² c,y=x² (x>0) d,y=-x² (x>0)
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![当k取任意实数时,抛物线y=½(x-k)²+k²的顶点所在曲线是( )A,y=x² b,y=-x² c,y=x² (x>0) d,y=-x² (x>0)](/uploads/image/z/8598226-58-6.jpg?t=%E5%BD%93k%E5%8F%96%E4%BB%BB%E6%84%8F%E5%AE%9E%E6%95%B0%E6%97%B6%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D%26%23189%3B%EF%BC%88x-k%EF%BC%89%26%23178%3B%2Bk%26%23178%3B%E7%9A%84%E9%A1%B6%E7%82%B9%E6%89%80%E5%9C%A8%E6%9B%B2%E7%BA%BF%E6%98%AF%EF%BC%88+%EF%BC%89A%2Cy%3Dx%26%23178%3B++++++++++b%2Cy%3D-x%26%23178%3B+++++++++c%2Cy%3Dx%26%23178%3B++%28x%3E0%29++++d%2Cy%3D-x%26%23178%3B++%28x%3E0%29)
当k取任意实数时,抛物线y=½(x-k)²+k²的顶点所在曲线是( )A,y=x² b,y=-x² c,y=x² (x>0) d,y=-x² (x>0)
当k取任意实数时,抛物线y=½(x-k)²+k²的顶点所在曲线是( )
A,y=x² b,y=-x² c,y=x² (x>0) d,y=-x² (x>0)
当k取任意实数时,抛物线y=½(x-k)²+k²的顶点所在曲线是( )A,y=x² b,y=-x² c,y=x² (x>0) d,y=-x² (x>0)
由抛物线y=½(x-k)²+k²方程可知,此抛物线的特点是开口向上,对称轴为x=k,最小值为k²
由此得知k取任意实数时,k²≥0,答案是显而易见的,是A,y=x²