Mathematics
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  • Member for 3 years, 6 months
  • Last seen more than a week ago
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9
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All Questions Answers
Score Newest
question
10
find positive real number x that satisfies $2001=x\lfloor x\lfloor x\lfloor x\rfloor\rfloor\rfloor$
Jan 6, 2020
question
6
What is the maximum value of $\frac{7x+2y}{2x+2}+\frac{3x+8y}{2y+2}$ while $0≤x,y≤1$
Dec 15, 2019
question
5
function defined by its derivative at a specific point
Dec 7, 2019
question
5
Prove that "injective function $f:X\to Y$ exists" and "surjective function $g:Y\to X$ exists" is logically equivalent.
Dec 28, 2019
answer
4
What is the maximum value of $\frac{7x+2y}{2x+2}+\frac{3x+8y}{2y+2}$ while $0≤x,y≤1$
Dec 15, 2019
question
4
find maximum value of $\frac x{(x^2+1)^{\frac32}}$ with AM-GM inequality
Aug 10, 2020
question
3
Maximum value of $\frac{x}{y+1}+\frac{y}{x+1}$ while $0\leq x,y \leq 1$
Dec 14, 2019
question
2
Prove$\left(\bigcap_{i\in I}A_i\right)\cup\left(\bigcap_{j\in J}B_j\right)=\bigcap_{(i,j)\in I\times J}{(A_i\cup B_j)}$
Dec 26, 2019
question
2
find all ordered pairs of natural numbers (x,y,z) that satisfies $x^{x^y} \cdot y^{y^z} \cdot z^{z^x} = 1990^{1990} \cdot xyz (x\lt y \lt z)$
Nov 14, 2020
answer
2
Suppose that $x=3-4t$ and $y=5+2t$. Find $x$ in terms of $y$.
Dec 6, 2019
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