Recent content by lema21

I don't know how to solve for u(x,y) from where I left of after 5.

Okay, thank you so much :)

So I can just finish this by stating that since they equal the same value that they then equal each other?

I need help actually creating the proof. I've done the scratch needed for the problem, it's just forming the proof that I need help in. Bar(a+bi/c+di)= (a-bi) / (c-di) Bar ((a+bi/c+di)*(c-di/c-di)) = ((a-bi/c-di)*(c+di/c+di)) Bar((ac+bd/c^2 +d^2)+(i(bc-ad)/c^2+d^2)) =...

I just want to know if this proof is okay, and I would like advise on how to improve it. Proof: i. Proving that ∠BAC ⩭∠BDC: Let gamma be the circumscribed circle of ABC. Let D be the point on gamma such that DB is a diameter of gamma. The sum of the angles within a triangle equal to 180°. Adding...

Would drawing the diagrams for the LHS and RHS be enough to verify?

Thank you so much for your help :) I really do appreciate it.

n!

Okay so I factored out the (n-1)! and got (n-1)! [(n-r)+r] = n(n-1)!

I got (n-r)(n-1)! + r(n-1)!

For the first fraction I got (n-r)(n-1)! / r!(n-r)!

Oh nevermind... I get it.

Oh, my previous reply was my simplified answer after adding both fractions. I don't see how you simplified the denominator from the middle to the last part.