This video tutorial covers practice problems 98-101, focusing on finding intervals of increase and decrease, identifying local and absolute maxima and minima, and analyzing trigonometric functions. It also includes a real-world application of population modeling using functions. The video emphasizes the importance of derivatives in determining function behavior and provides step-by-step solutions to each example.

What is the main focus of the video tutorial?

• Understanding the basics of algebra.

• Solving calculus problems related to derivatives and integrals.

• Practicing examples 98-101 related to calculus.

• Learning about trigonometric identities.

What is the function f(x) in Example 98?

• x^4 + 8x^2 + 1

• x^2 - 8x + 1

• x^4 - 8x^2 - 1

• x^3 - 8x + 1

What is the first derivative of the function f(x) = x^4 - 8x^2 - 1?

• x^3 - 8x

• 3x^2 - 8x

• 4x^3 + 16x

• 4x^3 - 16x

Which intervals indicate where the function is increasing?

• (-2, 2) and (0, ∞)

• (-∞, 0) and (2, ∞)

• (-2, 0) and (2, ∞)

• (-∞, -2) and (0, 2)

What are the critical points of the function in Example 98?

• -2, 0, 2

• -4, 0, 4

• -1, 0, 1

• -3, 0, 3

At which x-value does the function have a local maximum?

• x = -2

• x = 0

• x = 2

• x = 3

What is the local minimum value of the function at x = -2?

• 17

• -17

• -1

• 0

What is the function used in Example 99?

• 3x^4 + 16x^3 - 18x^2

• 3x^4 - 16x^3 + 18x^2

• 3x^4 + 16x^2 - 18x

• 3x^3 + 16x^2 - 18x

What is the absolute maximum value of the function in Example 99?

• 5

• 17

• 0

• 2080

What is the absolute minimum value of the function in Example 99?

• 5

• 0

• 2080

• -17