Question

so i go up to the teacher today and ask her why i only get 3 pts out of the 8pt extra credit; and then i got me 8 pts lol

Answer 1

ask and you shall receive!!!!!

Answer 2

prove that this is a tautology using rules, not a truth table.

[(p->q) ^ (q->r)] -> (p->r)

Answer 3

[(p->q) ^ (q->r)] -> (p->r)

[-(p->q) -^ -(q->r)] v (p->r)

(p^-q) v (q^-r) v (-p v r)

(p^-q)v -p v (q^-r) v r

(pv-p) ^ (-q v-p) v (qv r) ^ (-r v r)

T ^ (-q v-p) v (q v r) ^ T

(-q v-p) v (q v r)

-q v-p v q v r

(-q v q) v -p v r

T v (-p v r)

T