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Dokažte tvrzení sporem
Dokaž následující tvrzení sporem:
∀ x ∈ \mathbb{R} platí, že \large \Large \frac{x}{10}\large + 6x- 1,4 \lt \Large \frac{3}{5}\large + 6,1x
\large \Large \frac{x}{10}\large + 6x- 1,4 \geq \Large \frac{3}{5}\large + 6,1x\rightarrow -14 \geq 6 (tj. spor)
\large \Large \frac{x}{10}\large + 6x- 1,4 = \Large \frac{3}{5}\large + 6,1x\rightarrow -14 = 6 (tj. spor)
\large \Large \frac{x}{10}\large + 6x- 1,4 \leq \Large \frac{3}{5}\large + 6,1x\rightarrow -14 \leq 6 (tj. spor)
\large \Large \frac{x}{10}\large + 6x- 1,4 \gt \Large \frac{3}{5}\large + 6,1x\rightarrow -14 \gt 6 (tj. spor)