# Math

1) a) Decide if (q  ( p~ q))~ p is a tautology using propositional equivalence and the
laws of logic.
b) Prove that the following argument is valid:
q
q r
p r
p
~
_________
~

c) Replace p, q and r in 1b) by statements and construct an argument.

No clue how to even start. Thank you

1. Many of the symbols aren't showing up. Try rewriting using ∧ and ∨, or & and |.

posted by mwlevin

First Name

## Similar Questions

1. ### Chemistry

I'm having a hard time with Redox and how to figure out which is redox Select all of the reactions that are redox reactions. I) Ca + 2H2O  Ca(OH)2 + H2 II) CaO + H2O  Ca(OH)2 III) Ca(OH)2 + H3PO4  Ca3(PO4)2
2. ### Chemistry

I'm having a hard time with Redox and how to figure out which is redox Select all of the reactions that are redox reactions. I) Ca + 2H2O  Ca(OH)2 + H2 II) CaO + H2O  Ca(OH)2 III) Ca(OH)2 + H3PO4  Ca3(PO4)2
3. ### chemistry

9). What is the balanced equation for the acid–base reaction of nitrous acid with lithium hydroxide? LiOH(aq) + HNO3(aq)  H2O(l) + LiNO3(aq) Li(OH)2(aq) + 2 HNO3(aq)  2 H2O(l) + Li(NO3)2(aq) LiOH(aq) + HNO2(aq)
4. ### chemistry

If the standard state of sufur is S8 (s), which of the following equations represents the standard enthalpy of formation of H2SO4 (ℓ) ?  A. 2H (g) + S (g) + 4 O (g)  H2SO4 (ℓ) B. H2 (g) + S8 (g) + 2 O2 (g)
5. ### Chemistry

If the standard state of sufur is S8 (s), which of the following equations represents the standard enthalpy of formation of H2SO4 (ℓ) ?  A. 2H (g) + S (g) + 4 O (g)  H2SO4 (ℓ) B. H2 (g) + S8 (g) + 2 O2 (g)
6. ### Symbolic Logic

1. ((∀x-Fx v ∀xGx) v -(∀xKx → -∃y∀z∃w-Dyzw)) & ((∀xFx & ∀x-Gx) v (∃xKx → ∀y∃z∀wDyzw)) ├ ∀x(((Fx → Gx) → (Kx →
7. ### calculus

Let f x   coth x . Use the Graph software posted in Moodle to do the following: (a) Graph f x  . (b) Graph the tangent and normal lines to the graph of f x  at x 1.
8. ### Logic

Using the law of inference, prove if the below argument is valid. (P1) R -> B (P2) D V R (P3) B /D You may imply all rules of inference to figure out if it is valid.
9. ### Physics

3- A 5.0 Kg block is released from point A in the figure below. It travels along the smooth surface A  E except for the part B  C where the surface is rough. Point A is 3 m above the lowest point C. The block
10. ### Physics

3- A 5.0 Kg block is released from point A in the figure below. It travels along the smooth surface A  E except for the part B  C where the surface is rough. Point A is 3 m above the lowest point C. The block

More Similar Questions