I’m now sure how to work this out... my teacher had shown us this today at the end of class.
1 answer:
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In general, 23 more than a number is written as
In our case, x is 'twice a number'; thus,
Finally, the whole expression is
The request is to find the intersection of the two sets. By definition, the intersection of two sets is another set, composed by all the elements appearing in both sets.
In other words, is the set of all elements that P and Q have in common.
P contains all the numbers from 0 to 9, V contains all the odd numbers between 1 and 19. So, their intersection will be the odd numbers between 0 and 9, i.e.
Answer:
- 3 or 1 positive real zeros
- 0 negative real zeros
Step-by-step explanation:
The signs of the coefficients of the given terms are ...
+ - + -
There are three sign changes, so the number of positive real zeros is 3 or 1.
When odd-degree terms have their signs changed, the signs become ...
- - - -
There are no sign changes, hence no negative real zeros.
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A graph confirms this evaluation.
