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 10 What is Validity and Satisfiability in a propositional statement? 7 Prove $|a+b|+|a-b| \geq |a|+|b|$ 3 How to find the limit of two divided functions 2 Integers that satisfy $a^3= b^2 + 4$ 2 How to solve $2{x_{1}}+2{x_{2}}+{x_{3}}+{x_{4}}={12}$

### Reputation (690)

 +70 What is Validity and Satisfiability in a propositional statement? +10 How to solve $2{x_{1}}+2{x_{2}}+{x_{3}}+{x_{4}}={12}$ +15 Draw a square around a point. -2 how long does this subroutine and loop take

### Questions (2)

 4 Asymptotic value in math. 3 Maximum |E| on a given degree-diameter — Reference request

### Tags (44)

 11 propositional-calculus × 2 4 combinatorics × 6 7 proof-writing × 2 4 probability × 5 7 inequality × 2 3 elementary-number-theory × 3 7 problem-solving 3 functions × 2 4 graph-theory × 7 2 discrete-mathematics × 3

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