2.2 Lösning 2c

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\[ {\Delta y \over \Delta x} = {f(1) \, - \, f(-1) \over 1 - (-1)} = {e\,^1 - e\,^{(-1)} \over 2} = \]


\[ = 15+23 \, - \, (10+23) = 38-33 = 5 \]


\( y = e\,^x \) i intervallet \( -1 \leq x \,\leq\, 1 \)