View Profile: MarkFL - Math Help Boards

Today, 01:36

MarkFL replied to a thread Long over-arrow ... in Math Formulas (MathJax)

Hello, Peter! (Wave) This code: \overrightarrow{f(a)f(x)} produces: \overrightarrow{f(a)f(x)}

3 replies | 52 view(s)

October 20th, 2018, 01:03

MarkFL replied to a thread Synthetic division with Latex in Math Formulas (MathJax)

In our \(\LaTeX\) Live Preview, there is a "Begin/End" button you can click, and choose "Synthetic Division" from the dropdown menu, and follow the...

2 replies | 75 view(s)

October 16th, 2018, 22:43

MarkFL replied to a thread Plotting Polar Equations and converting to rectangular equations in Pre-Calculus

Okay, we are given the polar equation: r=6\cos(\theta) Now, from: x=r\cos(\theta)\implies \cos(\theta)=\frac{x}{r} We may write:

1 replies | 92 view(s)

October 16th, 2018, 22:20

MarkFL replied to a thread quadratic functions in Pre-Calculus

Hello, and welcome to MHB! (Wave) Let's first look at a graph of the two given functions and the given points: From the graph, it appears...

1 replies | 79 view(s)

October 16th, 2018, 15:05

MarkFL replied to a thread How to solve Chinese Remainder Theorem in Number Theory

I have edited your post to remove the blank space above and below the content, and to remove the personal information for your protection.

11 replies | 238 view(s)

October 15th, 2018, 15:31

MarkFL replied to a thread convert another equation to polar form in Pre-Calculus

We see we have a circle centered at the origin, and in polar coordinates, that's simply a constant value for \(r\). The Cartesian equation: ...

3 replies | 110 view(s)

October 15th, 2018, 15:11

MarkFL replied to a thread Triviality vs. Intuition in Linear and Abstract Algebra

Generally speaking, I certainly would not say the two terms are interchangeable, or synonymous.

9 replies | 202 view(s)

October 15th, 2018, 15:05

MarkFL replied to a thread convert equation to polar form in Pre-Calculus

At this point, I would recommend you speak to the professor, and let him/her know what you've done.

10 replies | 210 view(s)

October 15th, 2018, 15:02

MarkFL replied to a thread convert another equation to polar form in Pre-Calculus

You need to also square the trig. functions: x^2+y^2=4 (r\cos(\theta))^2+(r\sin(\theta))^2=4 r^2\cos^2(\theta)+r^2\sin^2(\theta)=4 Factor...

3 replies | 110 view(s)

October 15th, 2018, 14:37

MarkFL replied to a thread convert equation to polar form in Pre-Calculus

Perhaps it wants: \theta=\frac{\pi}{4}(4k+1)

10 replies | 210 view(s)

October 15th, 2018, 14:33

MarkFL replied to a thread convert equation to polar form in Pre-Calculus

Any Cartesian line of the form: y=ax will correspond to a polar equation of the form: \tan(\theta)=a or:

10 replies | 210 view(s)

October 15th, 2018, 13:36

MarkFL replied to a thread convert equation to polar form in Pre-Calculus

If you divided through by \(r\), you have: \tan(\theta)=1 What does this imply for \(\theta\)?

10 replies | 210 view(s)

October 13th, 2018, 21:41

MarkFL replied to a thread Consensus on "homework questions" in Questions, Comments, and Feedback

It was very recently discussed among staff that greeting a new user, who likely isn't familiar with our goal to guide rather than provide complete...

1 replies | 112 view(s)

October 13th, 2018, 21:27

MarkFL replied to a thread Find a,b,c,d given max and min in cubic function in Calculus

I used a CAS to solve the system, but if I were to do it by hand, let's look at the four equations: a+b+c+d=-4\tag{1} -8a+4b-2c+d=1\tag{2} ...

4 replies | 167 view(s)

October 13th, 2018, 19:33

MarkFL replied to a thread Find a,b,c,d given max and min in cubic function in Calculus

Hello, and welcome to MHB! (Wave) We know two points on the curve, so we may write: f(1)=a(1)^3+b(1)^2+c(1)+d=a+b+c+d=-4 ...

4 replies | 167 view(s)

October 13th, 2018, 13:44

MarkFL replied to a thread Finding costs prior to finance charges in Pre-Algebra and Algebra

Hello, and welcome to MHB! (Wave) I re-titled your thread so that the title reflects the question being asked. So, let's walk through this...

1 replies | 79 view(s)

October 12th, 2018, 14:15

MarkFL replied to a thread My professor never even covered this problem in Pre-Calculus

It appears that Evgeny's post was quoted after he wrapped his code in math tags. I wasn't aware though that the issue of inline LaTeX bleeding into...

15 replies | 352 view(s)

October 12th, 2018, 13:47

MarkFL replied to a thread My professor never even covered this problem in Pre-Calculus

Are you using a mobile device?

15 replies | 352 view(s)

October 8th, 2018, 19:49

MarkFL replied to a thread [SOLVED] triple chain rule in Calculus

Check your signs on the LHS. :)

10 replies | 618 view(s)

October 8th, 2018, 19:29

MarkFL replied to a thread Evaluating cos((1/2)arccos(x)) in Pre-Calculus

The first thing I would consider is: 0\le\arccos(x)\le\pi Hence: 0\le\frac{1}{2}\arccos(x)\le\frac{\pi}{2} This means the cosine of the...

1 replies | 172 view(s)

October 8th, 2018, 15:27

MarkFL replied to a thread [SOLVED] triple chain rule in Calculus

You can't treat \(y\) as a constant, because it is a function of \(x\). You need to use the chain rule. :)

10 replies | 618 view(s)

October 7th, 2018, 19:32

MarkFL replied to a thread [SOLVED] triple chain rule in Calculus

I think I might square and arrange as: y^2-7x=\sqrt{7x+\sqrt{7x}} At this point you could implicitly differentiate w.r.t \(x\) and solve for...

10 replies | 618 view(s)

October 7th, 2018, 19:14

MarkFL replied to a thread 214 related rates gravel cone in Calculus

Gravel is being dumped from a conveyor belt at a rate of 30\,\frac{\text{ft}^3}{\text{min}} This tells us, if we let all measures of length be in...

2 replies | 409 view(s)

October 7th, 2018, 13:45

MarkFL replied to a thread Bisector properties in Geometry

It seems to me to be similar to asking if, for any particular number, are there multiple values that are half of that number. For example, we know 6...

4 replies | 179 view(s)

October 6th, 2018, 16:18

MarkFL replied to a thread Inequality with fractions in Pre-Algebra and Algebra

What I would do is divide the real number line into the following intervals (based on the critical values, the strength of the inequality and...

9 replies | 157 view(s)

October 6th, 2018, 14:49

MarkFL replied to a thread Inequality with fractions in Pre-Algebra and Algebra

Okay I did miss that, but that still leads to the same critical values and is a needless move.

9 replies | 157 view(s)

Math Help Boards

We are an online community that gives free mathematics help any time of the day about any problem, no matter what the level. You will have to register before you can post. To start viewing messages, select the forum that you want to visit from the selection below.

MarkFL

Pessimist Singularitarian

MHB Administrator
MHB Coder
MHB Math Helper
MHB Ambassador

Mini Statistics

Statistics

Total Posts

Thanks Data

Visitor Messages

General Information

October 22nd, 2018

October 21st, 2018

October 20th, 2018

October 18th, 2018

October 17th, 2018

Math Help Boards

We are an online community that gives free mathematics help any time of the day about any problem, no matter what the level. You will have to register before you can post. To start viewing messages, select the forum that you want to visit from the selection below.

MarkFL Pessimist Singularitarian MHB AdministratorMHB CoderMHB Math HelperMHB Ambassador

Mini Statistics

Statistics

Total Posts

Thanks Data

Visitor Messages

General Information

October 22nd, 2018

October 21st, 2018

October 20th, 2018

October 18th, 2018

October 17th, 2018

MarkFL

Pessimist Singularitarian

MHB Administrator
MHB Coder
MHB Math Helper
MHB Ambassador