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seth3336
09.10.2019 •
Mathematics
Which of the following functions has an inverse that is not a function? y = x y = 2x + 1 y = x²
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Ответ:
ANSWER
EXPLANATION
For a function to be an invertible, it must be a one-to-one function.
In other words , it's graph should pass the horizontal line test.
It is obvious that,
and
will pass the horizontal line test.
But
has a v-shape and hence cannot pass the horizontal line test.
This means that y=x² is not invertible. That is, its inverse is not a function.
Let us quickly check that:
Interchange x and y.
Solve for y,
This is not a function, because it doesn't pass the vertical line test.
Ответ:
-5
or -5.5
Step-by-step explanation:
We can see that there are 4 sections between -5 and -6. This indicates that each tick mark is 1/4 of whole number. B is situated 2 ticks after -5, so it must be -5
, or -5![\frac{1}{2}](/tpl/images/1869/6204/9cdae.png)