# Derivatives, tangents, marginal cost

Not what you're looking for?

See attachment

##### Purchase this Solution

##### Solution Summary

This shows how to find a derivative, the number of horizontal tangents for a given polynomial, and marginal cost.

##### Solution Preview

1-

d/dt(3t^2- 2t^(-3))= d/dt(3t^2)- d/dt(2t^(-3))= 6t- (-6t^(-4))= 6t+ 6t^(-4).

2-

The horizontal tangents are the tangents whose slope is zero. To find the tangent we have:

dy/dx= 3x^2+ 1

The question is: Can dy/dx= 0 happen here?

3x^2+ 1=0 ---> x^2= -1/3---> no roots. No ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Geometry - Real Life Application Problems

Understanding of how geometry applies to in real-world contexts

##### Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.

##### Probability Quiz

Some questions on probability

##### Exponential Expressions

In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.

##### Graphs and Functions

This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.