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angelisabeast5430
18.11.2019 •
Mathematics
Use the mean value theorem to prove that if the derivative of f(x) is less than or equal to 2 for x> 0 and f(0)=4 then f(x) is less than or equal to 2x+4 for all x greater than or equal to 0.
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Ответ:
The proof is given below.
Step-by-step explanation:
Given:
Using Mean Value Theorem,
Here,![a=0,\ b=x](/tpl/images/0379/0078/f05fe.png)
Therefore,![f'(c)=\frac{f(x)-f(0)}{x-0}=\frac{f(x)-4}{x}](/tpl/images/0379/0078/bb6cc.png)
Now, as per question the derivative of
is less than or equal to 2.
Therefore,
. Plug in the value of
. This gives,
Therefore, we get,
and hence it is proved using mean value theorem.
Ответ:
a
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
here m = 7, hence y = 7x + c
To find c substitute ( 8, 6 ) into the equation
6 = 56 + c ⇒ c = 6 - 56 = - 50, thus
y = 7x - 50 → a