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need help with my math hw lol
- Thread starter GD0X
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I do kind of have to sympathize with the OP. I remember in high school asking for help from my math teachers and getting either half-assed responses (like being told its impossible to find sine, cosine, and tangent without a calculator), or from one teacher when I was confused on logarithms:
"You're just bad at math, there is no way around that".
Turns out I just had bad teachers because when I studied it on my own I got a ton better and got A's in math in college in precalc, calc, calc2, discrete math, trig, physics, and I had some other math class in there (Edit: Linear Algebra).
Thank you Dummies series, you did what my high school teachers couldn't (and wouldn't!).
"You're just bad at math, there is no way around that".
Turns out I just had bad teachers because when I studied it on my own I got a ton better and got A's in math in college in precalc, calc, calc2, discrete math, trig, physics, and I had some other math class in there (Edit: Linear Algebra).
Thank you Dummies series, you did what my high school teachers couldn't (and wouldn't!).
I'd love if there was a math book that explained real world uses for all that stuff. I'd buy it in a heart beat! (Seriously I would).
A lot of math I thought would be useless pops up in video game programming (I can't tell you how often sine and cosine waves came in handy, or trig, or even some discrete math) but even when I go back and study math to brush up on my skills I get lost because nothing ever explains a real world purpose for certain types of math.
Sorry didn't mean to hijack
Agreed. I use a lot of Trig on a regular basis. I can also do general formulas. But the stuff listed in the OP seems beyond what 99.4% of people would ever use in the real world. The only people I could see using that stuff would be engineers.
That's because "real world" math for the 99.4% is covered 1st grade. Addition, subtraction, multiplication, and division.
What is truly sad is how many people I have seen struggle with grade school math problems. They are really trying to figure out the basic word problem and it like 4 of them working on it and they ask me for help.
They were shocked that I was able to solve in my head. I am not sure which was more dishearting. Me seeing them struggle to do that problem or for them see me solve it quickly in my head after they could not of figured it out for a few days.
Darn you, dontwalkhand, you got there before me.
However, the answer is 12 - you forgot to divide by 2.
First you need to figure out does h(x) even have an inverse function. It must be truly monotonic to have an inverse function. You can figure this out by deriving h(x) and then calculating the zero points. Draw a flow graph and see if it's monotonic (i.e. is the graph going up or down all the time in its domain). If it has an inverse function, you can move to the next step - finding the function.
h(x)=y=3-(x+5/x-7)
Your job is to find the x in y=3-(x+5/x-7), that will be the inverse function. Then you simply plug in the 9 at the place of y in the inverse function.
I don't. But that's fine with me. I'm pretty sure that level of math is useless to me (and the reason I changed my major from engineering).
I love giving cashiers say $1.06 for an 81¢ purchase.
I am truly evil.
That's always a fun game!
The actual math behind this is actually fairly simple. The main point is solving the equation for x. Then you just plug in the 9 and it becomes a regular everyday math problem (addition, subtraction etc.). Math is a lot more complicated if you put it in words because of all the terminology.
Careful!!! Don't say that!!!
I used to say the same thing and then all of the stuff I thought was useless popped up in video game development.
Yes, but if you want to do anything technical (this includes programming! you can't be ignorant of math to do programming...) you're going to have to at least understand math
Yes, but if you want to do anything technical (this includes programming! you can't be ignorant of math to do programming...) you're going to have to at least understand math
Right, but the 99.4% doesn't do anything technical.
Pretty sure you mean differentiating
I don't know the English terms
Deriving sounded cool and the spellchecker didn't kick in either
Yes, but if you want to do anything technical (this includes programming! you can't be ignorant of math to do programming...) you're going to have to at least understand math
I remember in the first college I went to (it was a community college) when I had my first programming class and none of the students with the exception of a few of us knew what a variable was
I took 3rd year Algebra and I plan to take Masters level as well. I use all of it in programming. Matrices? Psch, matrices are nothing. You should try use groups in 3D programming, its magic.
I don't know the English terms
Well, deriving is the ...producing (?)of a formula. Context: "Newton, upon seeing the apply fall from the tree, derived that the formula for gravity was mass*acceleration).
Differentiating, is the process of taking the derivative. They couldn't use derive again, it had already been used