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ABDELRAHMAN SAID ABDELRAHMAN

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algebra-precalculus

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5	Prove that $ { a }^{ 2 }+2ab+{ b }^{ 2}\ge 0$ without using $(a+b) ^{ 2 }$
3	prove that $n$ is divisible by $8$
1	Find the relationship between the sides of a triangle and the diameter of the circumscribed circle. [duplicate]
0	How do I Find the value of this expression?
0	Find sum of two primes if their difference is equal to $3{ n }^{ 2 }-5n-1$

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1	Find the limit distribution of $Y_n =\frac{\Sigma_{i=1}^{n}X_i}{\sqrt{\Sigma_{i=1}^{n}\|X_i\|^2} }$.
1	For what $p$ values does the series $\sum_{n=1}^\infty \sqrt{n^{p-4}}$ converge?
1	How to expand $(x_1 + x_2 + x_3 + x_4 + x_5 +\cdots+x_n)^{2}$
0	Show $a+(a+d)+(a+2d)+\cdots+(a+nd)=a(n+1)+d\frac{n(n+1)}{2}$