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location Washington, DC
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visits member for 2 years, 11 months
seen Oct 10 at 23:51
My name is Boda Cydo. I am from Africa but now live in Washington DC.

Oct
6
awarded  Benefactor
Oct
5
comment How to solve this limit $\lim_{n\to\infty} ((\frac{1}{\sqrt{n^2+1}}) + \cdots + (\frac{1}{\sqrt{n^2+n}}))$
Thankssssssss it helped so much. :))) It will take some time before I can apply it somewhere. This is much higher level math... :))
Oct
5
comment How to solve this limit $\lim_{n\to\infty} ((\frac{1}{\sqrt{n^2+1}}) + \cdots + (\frac{1}{\sqrt{n^2+n}}))$
@ByronSchmuland Wow... You're right. n is fixed for all terms, rather changing from 1 to n for every term...
Oct
5
comment How to solve this limit $\lim_{n\to\infty} ((\frac{1}{\sqrt{n^2+1}}) + \cdots + (\frac{1}{\sqrt{n^2+n}}))$
Thanks, the first part is now clear. The second part ... it's not quite clear how you went from $$\sqrt{n^2+i}$$ in the denominator to $$\sqrt{1+xdx}$$ ... and it's also not clear how you went from $$\frac{dx}{\sqrt{1+xdx}}$$ to just $$dx$$. Did I make myself clearer?
Oct
5
comment How to solve this limit $\lim_{n\to\infty} ((\frac{1}{\sqrt{n^2+1}}) + \cdots + (\frac{1}{\sqrt{n^2+n}}))$
Thanks, but this is a bit way over my understanding :) For example, how did you go in the last equation to integral from 0 to 1, rather than from 1 to infinity? Also... how did you end up with $$sqrt(1 + x*dx)$$ ... Also how did nominator and denominator cancel to just have $dx$...
Oct
5
accepted How to solve this limit $\lim_{n\to\infty} ((\frac{1}{\sqrt{n^2+1}}) + \cdots + (\frac{1}{\sqrt{n^2+n}}))$
Oct
5
comment How to solve this limit $\lim_{n\to\infty} ((\frac{1}{\sqrt{n^2+1}}) + \cdots + (\frac{1}{\sqrt{n^2+n}}))$
Ah thanks! I solved it. :) Answer is 1 :))
Oct
5
asked How to solve this limit $\lim_{n\to\infty} ((\frac{1}{\sqrt{n^2+1}}) + \cdots + (\frac{1}{\sqrt{n^2+n}}))$
Oct
3
accepted How to plot $r^2 = 36\cos(2\phi)$ in Cartesian coordinates?
Oct
2
comment How to plot $r^2 = 36\cos(2\phi)$ in Cartesian coordinates?
I love your answer. I'll try to plot parabola. This is going to be challenging but I'm going to try this. :)
Oct
2
comment How to plot $r^2 = 36\cos(2\phi)$ in Cartesian coordinates?
I think you're missing half of solution (part from $phi$ going from pi to 2pi). Can you please check?
Oct
2
awarded  Popular Question
Oct
1
awarded  Promoter
Oct
1
revised Google Interview Question about a town where if a couple has a girl born, they can't have more children…
added 48 characters in body
Oct
1
awarded  Nice Question
Oct
1
comment Google Interview Question about a town where if a couple has a girl born, they can't have more children…
Couples can have more finitely more boys than girls. They can have just 1 girl ever. How can it be 1:1... Does 1:1 mean that there are 9999 girls and 9999 boys? That can't just be right.
Oct
1
comment Google Interview Question about a town where if a couple has a girl born, they can't have more children…
Is this probability paradox? If answer is 1:1 then I quit mathematics.
Oct
1
comment Google Interview Question about a town where if a couple has a girl born, they can't have more children…
@ReneSchipperus How? Probability is in favor of boys. It can't be 1:1...
Oct
1
comment Google Interview Question about a town where if a couple has a girl born, they can't have more children…
@AndréNicolas I don't understand. You can have 2 boys and 1 girl... or 1000000000 boys and 1 girl.. It's not 1:1...
Oct
1
asked Google Interview Question about a town where if a couple has a girl born, they can't have more children…