10月15日星期四记忆力课程(19:30-21:00)2,3
mathaction sandboxdiracdelta
math.lamar.edu/classes/calciii/partialderivatives_files/eq0030p.
99deltamath99calcmedic99desmos99geogebra99wolfram
h" #define eps 1e-7 int main() delta=b*b-4*a*c; { if(delta>=0)
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