Question

se considera functia f: R→R, f(x)=-3x^{2}+(m+1)x+5. Determinati valorile parametrului real m, stiind ca varful parabolei asociate functiei f are abscisa egala cu -1.

Answer 1

Varful parabolei are abscisa $x_{v}=- \frac{b}{2a},deci,-1=- \frac{m+1}{6},sau,m+1=6,de,unde,m=5$