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janyiareese12
29.01.2022 •
Mathematics
Find z. Write your answer in simplest radical form.
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Ответ:
Let's solve ~
The given triangle is a right angled Triangle, so we can apply Trigonometric relations to find the required result ;
That is :
So, the value of z is![\sf 8\: mm](/tpl/images/2636/6168/91434.png)
Ответ:
x=-1 is a maximum vaue.
Step-by-step explanation:
To find the minimum and maximum values of the function f(x), we're going to derivate it:
f(x) = –5x^2 – 10x + 6 ⇒ f'(x) = -10x - 10
The points where f'(x) is zero, could be a maximum or a minimum. Then:
f'(x) = -10x - 10 = 0 ⇒ x=-1
Now, to know if x=-1 is a maximum or a minimum, we need to evaluate the original function for x when it tends to -1 from the right and from the left.
Therefore:
For x=-2:
f(x) = 6 (Positive)
For x=0:
f(x) = 6 (Positive)
For x=-1
f(x) = 11 (Positive)
Given that at x=-1, f(x) = 11, and then it goes down to 6 when x=0, we can say that it's a maximum.