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user35508

I am a 9th grader learning new topics.

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10 Finding the last two digits of a number May 29 '17
8 The expression $\sqrt{13+3\sqrt{\frac{23}{3}}} +\sqrt{13-3\sqrt{\frac{23}{3}}} $ is which type of number? Mar 8 '17
8 Show that $\frac{1}{a^n+b^n+c^n} = \frac{1}{a^n} + \frac{1}{b^n} + \frac{1}{c^n}$ Feb 27 '18
7 Find the value of the series $\frac{8}{5} + \frac{16}{65} + \frac{24}{325} + \frac{32}{1025} + …$ to 20 terms. Aug 12
7 Find $\sum_{r=1}^{20} (-1)^r\frac{r^2+r+1}{r!}$. Aug 22
7 The roots of the equation $x^4-8x^3+ax^2-bx+16=0$ are positive if Mar 11 '17
6 Find $1^2+3^2+…99^2$ given $1^1+2^2+…+100^2$ and $1^1+2^2+…+50^2$ Mar 14 '17
6 Is my proof of $\lim_{x\to \infty}\frac 1x = 0$ correct? Feb 10 '17
6 Let $p=1+\frac{1}{\sqrt 2}+\cdots\frac{1}{\sqrt {120}}$ and $q=\frac{1}{\sqrt 2}+\frac{1}{\sqrt 3}+\cdots\frac{1}{\sqrt {121}}$ then Aug 12
6 Finding $ \int \frac{5x^2-x-4}{x^5+x^4+1}dx$ Mar 27 '17
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