funkcje zdaniowe
: 28 lis 2020, 10:22
Zbadać, czy podane funkcje zdaniowe z kwantyfikatorami są prawdziwe:
a. \( \bigvee_ {x \in \Bbb R} \sin x= \frac{1}{2} \)
b. \( \bigwedge _ {x \in \Bbb R} x^2+4x+3>0\)
c. \( \bigwedge _ {x \in \Bbb R} \bigvee _ {y \in \Bbb R} x^2-y^2=0\)
d. \( \bigvee _ {y \in \Bbb R} \bigwedge _ {x \in \Bbb R} xy=0\)
e. \( \bigwedge _ {x \in\Bbb R} \bigwedge _ {n \in\Bbb N} |x^n|=|x|^n\)
f. \( \bigvee _ {n \in \Bbb N} \bigvee _ {x,y,z \in \Bbb R}x^n+y^n=z^n\)
a. \( \bigvee_ {x \in \Bbb R} \sin x= \frac{1}{2} \)
b. \( \bigwedge _ {x \in \Bbb R} x^2+4x+3>0\)
c. \( \bigwedge _ {x \in \Bbb R} \bigvee _ {y \in \Bbb R} x^2-y^2=0\)
d. \( \bigvee _ {y \in \Bbb R} \bigwedge _ {x \in \Bbb R} xy=0\)
e. \( \bigwedge _ {x \in\Bbb R} \bigwedge _ {n \in\Bbb N} |x^n|=|x|^n\)
f. \( \bigvee _ {n \in \Bbb N} \bigvee _ {x,y,z \in \Bbb R}x^n+y^n=z^n\)