minthao_2011

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39 Questions

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18	How do I get my equation to have the form $(x-a)^2 + (y-b)^2 + (z-c)^2-d = 0$?
16	How do I introduce a new variable in a trigonometric equation?
8	How to solve a system of equations of the Vietnamese Mathematical Olympiad?
7	Finding the number of solutions to a diophantine equation
6	How to calculate this sum?

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947 Reputation

+10	How do I get my equation to have the form $(x-a)^2 + (y-b)^2 + (z-c)^2-d = 0$?
+25	Find all the integer numbers $a$, $b$, $c$, $d$, $e$, $f$, $k$ to this equation have three integer different solutions?
+5	How to substitute $x$ in a expression $f(x)$ but not calculate the value of the $f(x)$ at the point $x$?
+5	How to convert the symbol $d$ in Integrate into $\mathrm{d}$?

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4 Answers

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2	How do I work with Root objects?
1	Scalar product of two vectors have the least value
0	How to prove an expression by method of mathematical induction?
0	Can Mathematica Handle Open Intervals? Interval complements?

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2 equation-solving × 23	0 output-formatting × 12
2 trigonometry × 6	0 diophantine-equations × 4
2 symbolic × 4	0 algebraic-manipulation × 4
2 messages × 2	0 calculus-and-analysis × 3
1 mathematical-optimization × 3	0 geometry × 2

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