گام به گام آمار و احتمال - درس اول : منطق ریاضی | استاد ملاسعیدی

$\exists x\in (-\,\infty \,\,,\,\,\,\,0)\,\,\,\,\,;\,\,\,\,\,\,\,x+\frac{1}{x}>-2$

$\exists x\in (-\,\infty \,\,,\,\,\,\,0)\,\,\,\,\,;\,\,\,\,\,\,\,x+\frac{1}{x}>2$

$\exists x\in (0\,\,,\,\,\,\,+\infty )\,\,\,\,\,;\,\,\,\,\,\,\,x+\frac{1}{x}>-2$

$\exists x\in (0\,\,,\,\,\,\,+\infty )\,\,\,\,\,;\,\,\,\,\,\,\,x+\frac{1}{x}>2$

$\forall x\in \mathbb{R}\,\,\,;\,\,\,\,\,\,\,\frac{{{x}^{2}}-16}{x+4}=x-4$

$\forall x\in \mathbb{R}\,\,\,;\,\,\,\,\,\,\,(x+\frac{1}{x}\le -2)\vee (x+\frac{1}{x}\ge 2)$

$\forall x\in \mathbb{R}\,\,\,;\,\,\,\,\,\,\,2{{x}^{2}}+5x+4\ne 0$

$\forall x\in \mathbb{N}\,\,\,;\,\,\,\,\,\,\,{{x}^{2}}>x$

p و r نادرست

r و q نادرست

$r$ درست و $p$ نادرست

$q$ درست و $p$ نادرست