The maths" problems.(20)
2017/07/04 11:13
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發問:
don"t know how to do it. And it was very important for me. Can anyone help me ? Find the possible value(s) of k if kx^2 + 4x + (3k-1) = 0 很急...如果有人識的話可以在這裡教教我嗎... 20點!!! 更新: Find the possible value(s) of k if kx^2 + 4x + (3k-1) = 0 has two equal real roots.
最佳解答:
圖片參考：http://j.imagehost.org/0110/ScreenHunter_03_Apr_24_14_52.gif http://j.imagehost.org/0110/ScreenHunter_03_Apr_24_14_52.gif
其他解答:
two equal real roots. → Δ = 0 = B^2 - 4AC 4^2 - 4(k)(3k-1) = 0 16 - (12k^2 - 4k)=0 16-12k^2+4k=0 k=(1+1/3) or k=-1(rej.)|||||Find the possible value(s) of k if kx^2 + 4x + (3k-1) = 0 has two equal real roots.|||||問題是否已完全盡錄
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The maths" problems.(20)發問:
don"t know how to do it. And it was very important for me. Can anyone help me ? Find the possible value(s) of k if kx^2 + 4x + (3k-1) = 0 很急...如果有人識的話可以在這裡教教我嗎... 20點!!! 更新: Find the possible value(s) of k if kx^2 + 4x + (3k-1) = 0 has two equal real roots.
最佳解答:
圖片參考：http://j.imagehost.org/0110/ScreenHunter_03_Apr_24_14_52.gif http://j.imagehost.org/0110/ScreenHunter_03_Apr_24_14_52.gif
其他解答:
two equal real roots. → Δ = 0 = B^2 - 4AC 4^2 - 4(k)(3k-1) = 0 16 - (12k^2 - 4k)=0 16-12k^2+4k=0 k=(1+1/3) or k=-1(rej.)|||||Find the possible value(s) of k if kx^2 + 4x + (3k-1) = 0 has two equal real roots.|||||問題是否已完全盡錄
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