Question
42. Hosni gave the following argument that 2(a 1 b) 5
2a 1 2b, for all integers a and b. If the argument is
correct, supply the missing reasons. If it is incorrect,
explain why not.
-a (b+a)= (-1)(a+b)
= (-1)a+ (-1) b
= a+ -b
2a 1 2b, for all integers a and b. If the argument is
correct, supply the missing reasons. If it is incorrect,
explain why not.
-a (b+a)= (-1)(a+b)
= (-1)a+ (-1) b
= a+ -b