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In mathematics, an algebraic expression is an expression built up from constants (usually, algebraic numbers) variables, and the basic algebraic operations: addition (+), subtraction (-), multiplication (×), division (÷), whole number powers, and roots (fractional powers).
The number 28 depicted as 28 balls arranged in a triangular pattern with the number of layers of 7 28 as the sum of four nonzero squares. Twenty-eight is a composite number and the second perfect number as it is the sum of its proper divisors: 1 + 2 + 4 + 7 + 14 = 28 {\displaystyle 1+2+4+7+14=28} .
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Powerball winning numbers for 12/28/2024. ... The Powerball is red and one number which is between 1 and 26. ... 3X, 4X, 5X, or 10X.
If the odd denominator d of a rational is not a multiple of 3, then all the iterates have the same denominator and the sequence of numerators can be obtained by applying the "3n + d " generalization [26] of the Collatz function = {(), + ().
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In November 2008 the company was the first to offer ETFs with 3X leverage, a move that was copied some months later by its competitors ProShares and Rydex Investments. The move made it one of the fastest-growing ETF companies, with its sixteen 3X ETFs reaching a total of $3.4 billion in assets by April 2009.
The integral of secant cubed is a frequent and challenging [1] indefinite integral of elementary calculus: = + + = ( + | + |) + = ( + ) +, | | < where is the inverse Gudermannian function, the integral of the secant function.