Answer:
A B D i think well i hope this helps
65 - 30 - 21 = 14
(sixty-five minus thirty minus twenty-one equals fourteen)
If
is true, then
is false, which in turn means
is true.
If
is false, then
is true, and so
is false.
So, because
in both cases, the statement is a tautology (always true).
If you were to put this in a table, you would have one column each for
. In the first column (
) you can think of
as an independent variable that can only take two values, true and false. In the next column (
), you would negate the value in the previous column. And so on.
It should roughly look like this:
p ... ~p ... ~(~p)
T ... F ... T
F ... T ... F
2/3 is equal to 8/12 and 3/4 is equal to 9/12
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