Quadratics (id: 66a83b348)

本题目来源于试卷: Quadratics，类别为 IB数学

[填空题]
The graph shows the curve of a quadratic functi; 6xh. ozd:x 1- xbnphk7eid/xon of the uqu41d39d ths pklz4;form $ f(x)=a x^{2}+b x+90 $.



1. Write down the equation for the axis of symmetry of the curve.   
2. Hence, or otherwise, find the value of a and the value of b . a =    b =   
3. Find the y -coordinate of the vertex of the curve.   

参考答案:
空格1: 2±2%  空格2: -2±2%  空格3: 8±2%  空格4: 98±2% 


本题详细解析:

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