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In the same way, xy means multiply the variable x by the variable y and 7xy means multiply the variable x by the variable y and multiply the whole thing by 7. The BODMAS rules mentioned in Numbers apply to algebra also. For example, x2 + 3(2y + 4) means: 1. multiply y by 2.(x,y) has the meaning of plane’s point coordinates. The first x is the horizontal coodinate (abscisa) and second is the vertical coordinate (ordenate). Both are coordinates. (x,y) has the meaning of a complex number: x is the real part and y is the imaginary part: x+yi.Answer: The formula is (x-y)³=x³-3x²y+3xy²-y³.
What does mean of XY mean?
(x,y) has the meaning of plane’s point coordinates. The first x is the horizontal coodinate (abscisa) and second is the vertical coordinate (ordenate). Both are coordinates. (x,y) has the meaning of a complex number: x is the real part and y is the imaginary part: x+yi.
What is the formula of XY?
Answer: The formula is (x-y)³=x³-3x²y+3xy²-y³.
Solving an equation for y and x
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What does the variable XY mean?
When multiplying two (or more) variables, we also write the variables next to each other to show that they’re being multiplied. For example, xy means “x times y.” This is another reason that we go with such rarely-used letters as our variables.
What does XY mean in probability?
The notation P(x|y) means P(x) given event y has occurred, this notation is used in conditional probability. There are two cases if x and y are dependent or if x and y are independent. Case 1) P(x|y) = P(x&y)/P(y) Case 2) P(x|y) = P(x) Cite.
What Y means in math?
The vertical value in a pair of coordinates. How far up or down the point is. The Y Coordinate is always written second in an ordered pair of coordinates (x,y) such as (12,5). In this example, the value “5” is the Y Coordinate. Also called “Ordinate”
Is xy the same as X Y?
Let x and y be two processes or operations and xy is the outcome of their consecutive application: first x, then y. A kindergarten level “real life” example: x is putting a sock on the left foot and y is putting a sock on the right foot; very obviously, the order of operation does not matter, xy = yx.
What is variance of X Y?
Var(X + Y) = Var(X – Y) = Var(X) + Var(Y) where Var(X + Y) is the variance of the sum of X and Y, Var(X – Y) is the variance of the difference between X and Y, Var(X) is the variance of X, and Var(Y) is the variance of Y. Note: The standard deviation (SD) is always equal to the square root of the variance (Var).
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What is the meaning of Y in math? – faq-all.com
What does X Y equal in math? (x,y) is a pair of real numbers. The meaning is: (x,y) is an ordered pair of numbers …
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What does E XY equal to?
For example, if X is height and Y is weight, E(XY ) is the average of (height × weight). We are interested in E(XY ) because it is used for calculating the covariance and correlation, which are measures of how closely related X and Y are (see Section 3.2).
How do you read x3 in math?
In the language of algebra, x3 (read “x to the third power”) means “x multiplied by itself three times“, or x x x. To find the value of real numbers raised to exponents, just multiply the large number attached to the exponent (called the base) by itself the indicated number of times.
What is Y coordinate?
Definition of y-coordinate
: a coordinate whose value is determined by measuring parallel to a y-axis specifically : ordinate.
What is X Y on a graph?
The horizontal axis is usually called the x-axis. The vertical axis is usually called the y-axis. The point where the x- and y-axis intersect is called the origin.
What is X Y and Z?
The x-axis and y-axis represent the first two dimensions; the z-axis, the third dimension. In a graphic image, the x and y denote width and height; the z denotes depth.
Implicit Differentiation
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What does a B mean in maths?
| Symbol | Symbol Name | Meaning / definition |
|---|---|---|
| A’ | complement | all the objects that do not belong to set A |
| A\B | relative complement | objects that belong to A and not to B |
| A-B | relative complement | objects that belong to A and not to B |
| A∆B | symmetric difference | objects that belong to A or B but not to their intersection |
What does M mean in math?
M in Roman numerals means 1000.
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