Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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Could just be a sign change. Let me see your answer.
On the step you just did
You mean on the step I just did or on the final answer?
I know we are not done, but on the expression you just posted for qh.... at the bottom you have b(u-3) and I get b(3-u), this is what I am talking about.
You should notice that I have a q^L in the partial answer. That is because it is not done yet.
I know, but on the thing you posted, the denominator you got ub-3b and I have 3b-ub
Shouldn't it be 3b-ub on the bottom ?
Ok thanks I got the same as you when I just expanded this.
Same thing here, we both used a computer but I will show you how you might do it by hand.
No of course not! I would use a calculator!
First I must ask a question:
would you ask someone how they did it by hand?
But were you able to rearrange/substitute the top two equations to get the same expressions as those posted?
I didn't get a solution to it. Just because you see an answer in a book that does not mean the author worked it out.