What's the difference between using these two formulas to find …
Say we have these two points on a xy plane. (2, 3) and (4, 5). The slope would be 1. To get the equation of the line we can use one of these two formulas. Substitution y and x values in the …
Determine the Number of Integer Solutions $x_1 + x_2 + x_3 + x_4 …
2014年11月11日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
How to derive this factorization $ax^2 + bx + c = a(x − x_1)(x − x_2)
2018年7月3日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
Calculate density and cumulative distribution of: Y = X1 - X2
X1 and X2 are independent and identically distributed. They are continuous and uniform over [-1,1]. Now I need to find the density function and cumulative distribution for Y = X1 - X2
How to find if the points fall in a straight line or not?
2014年3月6日 · The easiest way to do it is to find out if y2-y1/x2-x1 y3-y1/x3-x1 are equal (The slope of points 1 and 2 ...
Finding the basis of a subspace - Mathematics Stack Exchange
U1 = {(x1, x2, x3, x4) ∈ R 4 | x1 + 2x2 + 3x3 = 0} U2 = {(x1, x2, x3, x4) ∈ R 4 | x1 + x2 + x3 − x4 = x1 − 2x2 + x4 = 0} My attempt: for U1; I created a vector in which one variable, different in …
How many possible solutions for the equation $x_1 …
$\begingroup$ For the second : I used the replacement : y1=x1 -2 , y2=x2-3, y4=x4, y3=x3 and I am looking for ways to put 15 balls in 4 boxes where( y1+...+y4=15) while y4 can take up to …
probability - Expected value of $\max\{X_1,\ldots,X_n\}$ where …
2016年6月6日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
Show $f(x_1,x_2) = \frac{1}{x_1x_2}$ is convex for $(x_1,x_2) \in ...
2020年10月6日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
combinatorics - The Number Of Integer Solutions Of Equations ...
Step 1: First find the total number of solutions in which none of the variables from x1, x2, and x3 is zero. Step 2: Then find the number of solutions in which only one from x1, x2, and x3 is zero. …