Hi. For your first problem, have a look at this:
As for your second problem, we simply find a common denominator!
Hey, I am currently brushing up my maths skills, in preparation for a self taught engineering degree. I keep finding small mathematical rules that I have never come across, so I guess I need help filling in the gaps. Here is an example.
I understand everything up to the last step, I understand that you divide both sides by r, but why does the division only apply to the v on the right hand side, and not the entire v(1-s/100)?
I know I'm probably missing some fundamental math rules that would make this seem like a simple and trivial question, but if someone could kindly explain why, or even point me to some relevant materials to look at, I would be greatly appreciative.
OK also in my quest to solve this riddle, I have come across another little rule that I have not come across before.
So once again, I understand everything up to the 4th step, where the "+1" seems to vanish and become part of the dividend as "+q^2". Can anyone explain why this happens, and also maybe point me in the direction of some material to read.
Thanks!
Chris
It does apply to the whole thing: is exactly the same as or
It's just what you learned in third or fourth grade arithmetic- to add fractions, get a common denominator and add the numerators:I know I'm probably missing some fundamental math rules that would make this seem like a simple and trivial question, but if someone could kindly explain why, or even point me to some relevant materials to look at, I would be greatly appreciative.
OK also in my quest to solve this riddle, I have come across another little rule that I have not come across before.
So once again, I understand everything up to the 4th step, where the "+1" seems to vanish and become part of the dividend as "+q^2". Can anyone explain why this happens, and also maybe point me in the direction of some material to read.
Thanks!
Chris
.