شاه کلید نکات
شاه کلید سوال
ضابطهٔ تابع و نمودار آن را کامل کنید.
\(f\left( x \right) = \left\{ \begin{array}{l}x + 1\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - 1 \le x < 3\\...\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,3 \le x \le 6\end{array} \right.\)
در سال گذشته، دانش آموزان به این روش حل می کردند:
\(\begin{array}{l}m = \frac{{3 - 0}}{{3 - 6}} = \frac{3}{3} = - 1\\\\f\left( x \right) = mx + h \to f\left( 2 \right) = - 1\left( 2 \right) + h = 3 \to h = 6 \to f\left( x \right) = - x + 6\end{array}\)
\(f\left( x \right) = \left\{ \begin{array}{l}x + 1\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - 1 \le x < 3\\ - x + 6\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,3 \le x \le 6\end{array} \right.\)
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