# Gigili

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I write to discover what I think.

# 94 Questions

 11 The expected payoff of a dice game 11 $f(f(x))$ has no fixed points if $f(x)$ has no fixed points 10 Solving $x^3-y^3=xy+61$ in integers 7 Evaluating $\int_0^\infty \sqrt x e^{-x^3} dx$ 7 Negative value of $\sqrt[3]{20}$

# 3,514 Reputation

 +5 A Householder matrix is symmetric +5 If $A$ is full column rank, then $A^TA$ is always invertible +10 Solving $\sqrt{x^2 +2x + 1}-\sqrt{x^2-4x+4}=3$ +5 The expected payoff of a dice game

 18 Multiply Factorial 11 How to solve this quartic equation? 9 Proving $n^4 + 4 n^2 + 11$ is $16k$ 8 Some Simple Algebra 8 Solving $\sqrt{x^2 +2x + 1}-\sqrt{x^2-4x+4}=3$

# 73 Tags

 85 algebra-precalculus × 32 18 factorial 40 calculus × 16 16 linear-algebra × 30 21 trigonometry × 8 14 absolute-value × 4 21 polynomials × 6 13 differential-equations × 4 18 elementary-number-theory × 9 12 integration × 6

# 44 Accounts

 Mathematics 3,514 rep 1437 English Language & Usage 2,526 rep 62650 Islam 2,097 rep 1825 Computer Science 954 rep 620 Area 51 936 rep 117