Consider the function below......

[Yukina]

(A) f(x) = ln(x4 + 27),
(B) g(x) = 3x^(2/3) ? x


(a) Find the interval of increase and Find decrease.
(b) Find the local minimum value.
Find the interval where the function is concave up and concave down.

Somebody help me, please?

 

[Deleted member 4993]

(A) f(x) = ln(x4 + 27), <<<<<<<<<< What does x4 mean?(B) g(x) = 3x^(2/3) ? x


(a) Find the interval of increase and Find decrease. <<< What is the mathematical condition for function to increase or decrease?

(b) Find the local minimum value.<<< What is the mathematical condition for function to have a local minimum?

Find the interval where the function is concave up and concave down.<<< What is the mathematical condition for function to be concave up or down?

Somebody help me, please?

Start with plotting the functions - using a graphing calculator.

Then find the answers to the questions I posed from your textbook - look at the worked out example problems.

Please share your work with us, indicating exactly where you are stuck - so that we may know where to begin to help you.