. Find the derivative of 𝑦 = 𝑥^ 2 + 4*𝑥 − 6 at (3,5) and plot the function and derivative curves. Use the legend option for labelling the curve.

. Find the derivative of 𝑦 = 𝑥 ^2 + 4𝑥 − 6 at (3,5) and plot the function and derivative curves. Use the legend option for labelling the curve.

[DGM]

First off, most people are going to expect specific questions and a demonstration of effort before they help with what's obviously homework.

That said, the point (3,5) isn't on either y or y'. Is that supposed to be asking to evaluate at 3.5, or maybe at 3 and 5? Just something to consider.

This is fairly simple to do with symbolic operations. You can use syms() diff() and fplot().

[Xiao Yangcong]

There is an error in this question. Please describe the problem again.

[vidya g]

Find the derivative of 𝑦 = 𝑥^ 2 + 4*𝑥 − 6 at x=3,plot the function and derivative curves. Use the legend option for labelling the curve.

Answer 1

[Xiao Yangcong]

[John D'Errico]

Please don't do homework assignmets for students. It does not helpp them, only teaching them they can find the answer to their homework here, and we don't want that.

Answer 2

[Image Analyst]

Hint -- use the plot() and legend() functions:

x = linspace(0, 6, 1000); % Define range for x as [0, 6] or whatever you want.
y = x .^ 2 + 4 * x − 6 % Your formula.
plot(
yDerivative = % Some other function of x.  I'm sure you know Calculus.
plot(   % Plot yDerivative vs. x.  Use a different color.
legend(
% Find slope at x=3:
yDerivative = % same function but use 3 instead of x

% Optional (unasked for) stuff to make the plot pretty;
title('y = x .^ 2 + 4 * x − 6 and its derivative', 'FontSize', 18);
xlabel('x', 'FontSize', 18);
ylabel('y', 'FontSize', 18);'
grid on

Fill out the missing code. If you can't figure it out, read this:

How do I get help on homework questions on MATLAB Answers? - MATLAB Answers - MATLAB Central