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Think of 'not' as being an inverse. Not 1 = 0. Not 0 = 1. Using boolean algebra we can look at your question.
'and' is a test. It wants to know if BOTH P and Q are the same and if they are 1 (true). If they are not the same, or they are both 0, then the result is false or 0.
not P and Q is rewritten like so: (P and Q)' = X not P and not Q is rewritten like: P' and Q' = X (the apostrophe is used for not)
We will construct a truth table for each and compare the output. If the output is the same, then you have found your equivalency. Otherwise, they are not equivalent. P and Q are the inputs and X is the output.
P Q | X P Q | X
------ 0 0 | 1 0 0 | 1 0 1 | 1 0 1 | 0 1 0 | 1 1 0 | 0 1 1 | 0 1 1 | 0
Since the truth tables are not equal, not P and Q is not equivalent to not P and not Q.
Perhaps you meant "Is NOT(P AND Q) equivalent to NOT(P) AND NOT(Q)?"
NOT(P AND Q) can be thought of intuitively as "Not both P and Q." Which if you think about, you can see that it would be true if something were P but not Q, Q but not P, and neither P nor Q-- so long as they're not both true at the same time.
Now, "NOT(P) AND NOT(Q)" is clearly _only_ true when BOTH P and Q are false. So there are cases where NOT(P AND Q) is true but NOT(P) AND NOT(Q) is false (an example would be True(P) and False(Q)).
NOT(P AND Q) does have an equivalence however, according to De Morgan's Law. The NOT can be distributed, but in doing so we have to change the "AND" to an "OR".
NOT(P AND Q) is equivalent to NOT(P) OR NOT(Q)
What else can I help you with?
How does each multiplication problem compare to its cooresponding division problem?
By inverting the numbers. For example, if:2 x 3 = 6 then: 6 / 3 = 2
When can you say that the given number is a rational?
A number is said to be rational if it can be expressed as a ratio of two integers. That is, a number x is rational if and only if it is equivalent to p/q for some integers p and q where q is not 0.
What does p over q mean in algebra?
P! / q!(p-q)!
If B is between P and Q?
If B is between P and Q, then: P<B<Q
What is 4 times the sum of q and p?
4(p + q), or 4p + 4q
What statement is logically equivalent to "If p, then q"?
The statement "If not q, then not p" is logically equivalent to "If p, then q."
P-q and q-p are logically equivalent prove?
p --> q and q --> p are not equivalent p --> q and q --> (not)p are equivalent The truth table shows this. pq p --> q q -->(not)p f f t t f t t t t f f f t t t t
Wha tis the equivalent fractions of two numbers?
If the two numbers are p and q (where q is non zero) then the equivalent fraction is p/q.
Are there equivalent numbers?
Yes. For example, the rational number p/q is equivalent to the number (a*p)/(a*q) for any non-zero number a.
What is the equivalent ratio?
Given one ratio, p/q, you will obtain an equivalent ratio if you multiply p and q by any non-zero integer.
How can the statement "p implies q" be expressed in an equivalent form using the logical operator "or" and the negation of "p"?
The statement "p implies q" can be expressed as "not p or q" using the logical operator "or" and the negation of "p".
What are the example of equivalent sets?
P={1,3,5,7,9} q={2,4,6,8,10}
If p q and q r then p r. Converse statement B.A syllogism C.Contrapositive statement D.Inverse statement?
Converse: If p r then p q and q rContrapositive: If not p r then not (p q and q r) = If not p r then not p q or not q r Inverse: If not p q and q r then not p r = If not p q or not q r then not p r
An equation that shows two ratios are equivalent?
Two ratios, p/q and r/s (q and s non-zero) are equal if p/q - r/s = 0.
How do you check an equivalent fraction with multiplication and division?
If you start with a fraction p/q and are told that x/y is an equivalent fraction, then the simplest check is to cross-multiply: p*y must be equal to q*x.
What is the sum or difference of p and q?
The sum of p and q means (p+q). The difference of p and q means (p-q).
What is q²-p² divided by q-p?
q + p
