Chapter 3 - The Logic of Quantified Statements - Exercise Set 3.1 - Page 108: 33

a)True b)False c)True d)False

a)True, any positive number muliplied by another positive number is greater then zero b)False, two negative equal a positive and is not less then zero(Ex. -2*-4=8) c)True, any number muliplied by zero is zero d)False, counterexample a=-10;b=5;c=-10;d=4 -10*-10=100;5*4=20 100>20 so false