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1d
reviewed Leave Open Find $g(x)$ if $(x^2+a^2)(x^2 + b^2)(x^2 + c^2) = (f(x))^2 + (g(x))^2$ and $f(x)$ is a degree three polynomial
1d
comment Standard deviation in normal distribution
From tables, we want $\frac{0.02}{\sigma}\approx 1.645$. This is because in the standard normal, we have probability $0.05$ of being in the right tail $\gt 1.645$, and probability $0.05$ of being in the left tail $\lt -1.645$.
1d
reviewed No Action Needed Helmholtz decomposition and the fundamental solution
1d
reviewed Looks OK Find $g(x)$ if $(x^2+a^2)(x^2 + b^2)(x^2 + c^2) = (f(x))^2 + (g(x))^2$ and $f(x)$ is a degree three polynomial
1d
reviewed Looks OK In a triangle ABC,a:b:c is4:5:6.The ratio of the radius of the circumcircle to that of incircle is
1d
reviewed Leave Open Equivalance class in modulus
1d
reviewed Leave Open In a triangle ABC,a:b:c is4:5:6.The ratio of the radius of the circumcircle to that of incircle is
1d
reviewed Leave Open How to solve a pair of simultaneous linear congruences, using algebraic methods
1d
answered Prove that $\forall k\in\mathbb{Z}$, $3|k-2$ implies $3|k^2-1$
1d
revised Find $g(x)$ if $(x^2+a^2)(x^2 + b^2)(x^2 + c^2) = (f(x))^2 + (g(x))^2$ and $f(x)$ is a degree three polynomial
added 71 characters in body
1d
answered Find $g(x)$ if $(x^2+a^2)(x^2 + b^2)(x^2 + c^2) = (f(x))^2 + (g(x))^2$ and $f(x)$ is a degree three polynomial
1d
revised Probability of dying from smallpox?
edited body
1d
comment Equivalance class in modulus
Modulo $5$ there are $5$ equivalence classes. For $10$, there are $10$, and so on.
1d
answered Equivalance class in modulus
1d
answered Probability of dying from smallpox?
1d
comment Probability of dying from smallpox?
The probability at least $1$ person dies is $1$ minus the probability nobody does, which you computed earlier. It is about $0.76$, or if you prefer percent (I don't) it is about $76\%$.
1d
comment Given a particular order how many times will it appear in all the possible permutations it has?
If you want to think of all balls as distinct, then the number is the product of the factorials of the various numbers, so $3!$ because there are $3$ red times $2!$ because there are $2$ blue and so on.
1d
answered Direct proof and contradicttion
1d
reviewed Looks OK How to find a closed form of this simple factorial sequence
1d
reviewed Looks OK Epsilon Delta definition to prove $\lim_{x\to a} x^{1/3} = a^{1/3}$