You could divide the numerator and denominator by 2.

]]>To be fair I already knew most of elementary algebra. I just didn't understand it and needed to fill in lots of gaps. lol I just scanned through the online book. It will probably take me till next summer to go through this properly. But it doesn't seem that intimidating after going through Serge Lang's books. It seems to follow from there quite easily. I just feel maybe I should go through trigonometry and proofs in more detail first. Oh well good luck to me. xD

If you're confident about it then you should go ahead, algebra/precalculus is too boring anyway.

]]>If you want to understand calculus, you'll need to know about graphs; straight lines and how to get their gradient**; and then curves and how their gradient varies as x varies. [that's differential calculus ... integral calculus is a summation process that usually follows on from differential]

Some people learn mathematical topics because they need to for a qualification or a job or to help with some other field of study. From what you've said, it sounds like you want to do maths for fun. So the starting point ought to be "What do you enjoy?" Puzzles ? Mathematical Art ? ...? Personally, learning maths is just part of a wider interest that I have, which is to understand how/why things work. eg. Sun dials, why there are exactly 5 Archimedian solids, how you work out bicycle gear ratios, ....

You mention cryptology, economics, game theory, & statistics. Plenty of maths in all of those. Do you want to learn more about those?

Bob

**which is why that interactive graph is useful.

]]>Welcome. Hope you enjoy being a member.

Bob

]]>**Welcome to the forum.**

Bob

]]>Hi;

Post your question in the "Help me" thread.

This is hereby accomplished.

]]>Welcome to the forum! What's your favourite favourite question?]]>

Welcome to the forum.

but I can't find a link to explain reciprocals

Maybe this:

http://www.mathsisfun.com/reciprocal.html

And then:

http://www.mathsisfun.com/algebra/expon … ional.html

At the bottom of that page you will find related links.

Bob

]]>As far as "dx" goes, it can be interpreted as an emoticon, such as "XD", "XP", or "cx", usually showing excitement, happiness, or silliness, or it can be an infinitesimal value, i.e. the "dx" after a function in an integral, or part of a derivative written in Leibniz notation.

anonimnystefy wrote:

Is this the real life?

Is this just fantasy?Is the Matrix reality?

I don't know if this is the real life, since the real life can be easily defined, and at times this life that we (everyone) lives in is easily defined, but at other times it's hard to understand.

As far as this being fantasy, I don't know. It could be, it might not, who knows?

The Matrix might be reality, but it might not. Again, who knows?

What is your favorite color?

]]>Thanks for the welcomes m8s!

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