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20.12.2019 •
Mathematics
What are the solutions of the system?
{y=-6x-6
y=x^2-5x-6
answer choices:
a) (0, -1) and (0, -6)
b) (0, -1) and (-6, 0)
c) (-1, 0) and (-6, 0)
d) (-1, 0) and (0, -6)
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Ответ:
D. (-1, 0) and (0, -6)
Step-by-step explanation:
The system of equations:
y = -6x - 6
y = x² - 5x - 6
We equate the two equations;
-6x - 6 = x² - 5x - 6
x² + x + 0 = 0
x² + x = 0
x(x + 1) = 0
So, x = 0 or -1
When x = 0,
Then y = -6(0) - 6 = -6
When x = -1,
Then y = -6(-1) - 6 = 6 - 6 = 0
So the answer is: (0, -6) and (-1, 0)
Ответ:
option 1: determine whether (-x)^4 - (-x)^3 is equivalent to f(x)=x^4-x^3
step-by-step explanation:
first of all we will define the even function:
an even function is a function in which
f(-x) = f(x)
theoretically, putting -x in place of x gives the same original function.
so, for the given function:
f(x)=x^4-x^3
f(-x) = (-x)^4 - (-x)^3 should be equal to the original function f(x)=x^4-x^3
hence, option 1 is correct ..