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makenziehook8
06.06.2021 •
Mathematics
Find the average rate of change of f ( x ) = 3 x 2 − 9 on the interval [ 2 , b ] . Your answer will be an expression involving b
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Ответ:
Step-by-step explanation:
Given
Required
The average rate over![[2,b]](/tpl/images/1364/2338/a8459.png)
Average rate (m) is calculated using:
Where
So, we have:
Calculate f(b) and f(2)
So, we have:
Expand the numerator
Factorize
Factor out 3b + 6
Cancel out b - 2
Ответ:
Step-by-step explanation:
Side 1 = a
Side 2 = b
Side 3 = c
a = 2b
c = 5ft. + b
a + b + c = 49 feet
Substitute
2b + b + 5ft + b = 49 ft
Add the b’s
4b + 5ft = 49ft
Subtract 5ft from both sides of the equation
4b = 44ft
Divide both sides of the equation by 4 to isolate b
b = 11ft
a = b * 2 = 11 * 2 = 22ft
c = 49ft - 11ft - 22ft = 16ft
Hope this helps :)