Let f(x)=x^3-3bx+c
Find necessary and sufficient conditions on b and c such that the
equation f(x)=0 has three distinct real roots
恩~~這題不可能只有一解......是找範圍....
呵呵.....(￣▽￣＃)﹏﹏
如果害你解到3點半還解不出來的抱歉了.....
大家不要跟笨狗說，就讓他解到下周末好了.....v(￣︶￣)y....XD
阿你們算出答案是啥呢?
對了，為啥星期六早上PTT會連不上呢?
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