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x and y intercept+opt value
1. Given that the axis of symmetry of the graph of y=x^2+2kx-k is x=5.find(a) the value of k(b) the optimum value of y2. The y-intercept of the graph of y=(x+4)(x+k)-2k=4(a) find the value of k.(b) Find the coordinates of the vertex and the axis of symmetry of the graoh.3. The function... 顯示更多 1. Given that the axis of symmetry of the graph of y=x^2+2kx-k is x=5.find (a) the value of k (b) the optimum value of y 2. The y-intercept of the graph of y=(x+4)(x+k)-2k=4 (a) find the value of k. (b) Find the coordinates of the vertex and the axis of symmetry of the graoh. 3. The function y=(x-2)(3-2x)+x-k has an optimum value 1. (a) state whether the optimum value is a MAX. or a MIN. (b) find the value of k . (c) find the number of x-intercepts of the graph of the function. as i know, the no. of x-intercepts depends on the value of discriminant ,however from the equation, i don;t seem to find the value of b^2-4ac. Is there any method to fins out the discriminant from this equation? thanks 更新: why 2b, x=0? 更新 2: oh and i get it now! i am so stupid ...
最佳解答:
Please Read： 圖片參考：https://s.yimg.com/rk/HA07344914/o/674011010.png 2014-11-02 20:49:45 補充： 2b??? or 2a? If it is 2a, because I just substitute (0,4) in to the equation. y-intercept implies x=0
其他解答:
yea sorry thats 2a why will suddenly change to 0?
x and y intercept+opt value
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發問:1. Given that the axis of symmetry of the graph of y=x^2+2kx-k is x=5.find(a) the value of k(b) the optimum value of y2. The y-intercept of the graph of y=(x+4)(x+k)-2k=4(a) find the value of k.(b) Find the coordinates of the vertex and the axis of symmetry of the graoh.3. The function... 顯示更多 1. Given that the axis of symmetry of the graph of y=x^2+2kx-k is x=5.find (a) the value of k (b) the optimum value of y 2. The y-intercept of the graph of y=(x+4)(x+k)-2k=4 (a) find the value of k. (b) Find the coordinates of the vertex and the axis of symmetry of the graoh. 3. The function y=(x-2)(3-2x)+x-k has an optimum value 1. (a) state whether the optimum value is a MAX. or a MIN. (b) find the value of k . (c) find the number of x-intercepts of the graph of the function. as i know, the no. of x-intercepts depends on the value of discriminant ,however from the equation, i don;t seem to find the value of b^2-4ac. Is there any method to fins out the discriminant from this equation? thanks 更新: why 2b, x=0? 更新 2: oh and i get it now! i am so stupid ...
最佳解答:
Please Read： 圖片參考：https://s.yimg.com/rk/HA07344914/o/674011010.png 2014-11-02 20:49:45 補充： 2b??? or 2a? If it is 2a, because I just substitute (0,4) in to the equation. y-intercept implies x=0
其他解答:
yea sorry thats 2a why will suddenly change to 0?
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