How to find the intervals of increasing and decreasing using

Vikolers6 2021-12-17 Answered
How to find the intervals of increasing and decreasing using the first derivative given y=2x2+4x+3?
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Expert Answer

Robert Pina
Answered 2021-12-18 Author has 42 answers
Use the power rule:
ddx=2(2)x21+4(1)x11+0
And remember that x0=1 and a derivative of a constant is zero
f(x)=4x+4
Now, factor
4(x1)=0
x1=0
x=1
Now you pick numbers in between the interval and test them in the derivative. If the number is positive, the function is increasing and if it's negative the function is decreasing.
For example, pick 0 a number from the left
f(0)=4
This means that from (1,) the function is decreasing
And from (,1) the function is increasing.

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Cassandra Ramirez
Answered 2021-12-19 Author has 30 answers
O, god, thank you!

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