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Solve for X in the equation X^3 - X^0 = 26
November 13, 2024
The solution to the equation X^3 - X^0 = 26 is X = 3.
Calculate the determinant of a 4x4 matrix.
November 12, 2024
The determinant of the given 4x4 matrix is calculated using cofactor expansion along the fourth row, resulting in a determinant of -21.
Calculate the determinant of a 2x2 matrix.
November 12, 2024
The determinant of the 2x2 matrix [[2, 2], [3, 5]] is calculated as (2 * 5) - (2 * 3) = 4.
Solving an equation with absolute value and exponent
November 12, 2024
The equation (x-1)^(|x|-4) = 1 has solutions x = -4, 0, 2, and 4.
Calculate the difference of 100 squared and 99 squared.
November 12, 2024
The difference of squares formula is used to evaluate the expression 100^2 - 99^2, resulting in 199.
Find the smallest possible values of A and B for the number 645A2879B8 to be divisible by both 8 and 9.
November 11, 2024
To find the smallest possible values for A and B in a 10-digit number divisible by both 8 and 9, the last three digits (9B8) must be divisible by 8, and the sum of all digits must be divisible by 9. This leads to B=2 and A=3 as the smallest possible values.
Solving a quadratic equation by factoring
November 11, 2024
The equation x^2 - 2x = 0 has two solutions, x = 0 and x = 2, not just x = 2.
Find the value of b in the equation 2^b^2+2 = 64
November 9, 2024
The solution for b in the equation 2^(b^2+2) = 64 is b = 2.
Find the value of 2^(m+n)
November 9, 2024
To find 2^(m+n), solve for m and n in the equations 2^m = 1 and 2^n = 16, then substitute the values into the expression.
Evaluating Zero to the Power of Zero
November 7, 2024
The expression 0^0 is considered an indeterminate form in calculus because different approaches to evaluating it yield different potential values. While some approaches suggest a value of 1 and others suggest 0, the limit does not have a single, well-defined value. In some contexts, like combinatorics, it is defined as 1 for convenience.
Evaluate the absolute value of a vector.
November 6, 2024
The magnitude of the given row vector is calculated, resulting in 3.
Calculate the determinant of a 3x3 matrix.
November 6, 2024
The determinant of the 3x3 matrix is calculated using the formula a(ei - fh) - b(di - fg) + c(dh - eg), resulting in a determinant of 0.
Matrix Multiplication
November 6, 2024
The multiplication of the two given matrices results in a 2x3 matrix with entries calculated by multiplying corresponding rows and columns of the matrices and summing the products.
Simplify the following fractions.
November 6, 2024
The provided document details the simplification of algebraic fractions and the solution of algebraic expressions. Part 1 simplifies various rational expressions by factoring the numerators and denominators, canceling common factors. Part 2 involves adding, subtracting, and multiplying rational expressions, often requiring finding common denominators and simplifying the resulting expressions.
Solve for x in the equation 3^x - 2^x = 65
November 6, 2024
The equation 3^x - 2^x = 65 has a solution at x = 4.
Solve for x in the equation x^x + 6/x = 7
November 5, 2024
The equation x^x + 6/x = 7 has two solutions, x = 1 and x = 2, as demonstrated by direct substitution.
Finding the unknown angle in a geometry problem.
November 5, 2024
The unknown angle is 50 degrees.
Solve for x in the equation 3^(x+2) = 2^(x+3).
November 5, 2024
The solution to the equation 3^(x+2) = 2^(x+3) is found by taking the natural logarithm of both sides, applying logarithm properties, isolating x, and simplifying to an expression involving natural logarithms of 2 and 3. The approximate value of x is then calculated.
Simplify the expression ((i + 1)(i - 1))^2.
November 4, 2024
The expression $((i+1)(i-1))^2$ simplifies to 4.
Calculate the sum of the square roots of percentages.
November 4, 2024
The solution to the problem \sqrt{25\%} + \sqrt{49\%} is 1.2, which is equivalent to 120%.
Find the value of x in a triangle problem.
November 3, 2024
To find x, the exterior angle theorem is used, along with the knowledge that a right angle is 90 degrees, to solve for x, which equals 45 degrees.
Find the value of x in an equation with multiple roots of 17.
November 3, 2024
The solution to the equation involving radicals and exponents is x = 77/120.
Water Lily Growth Rate
November 3, 2024
The water lily takes 47 days to cover half the pond, given that it doubles in size each day and covers the entire pond on day 48.
Solve for x in the equation 3^(x^2)/9^x = 81
October 31, 2024
The equation 3^(x^2)/9^x = 81 is solved by rewriting the equation with the same base, simplifying the denominator, applying the quotient rule for exponents, equating the exponents, rearranging into a quadratic equation, and finally using the quadratic formula to find the two solutions, x = 1 + √5 and x = 1 - √5.
Find the unknown angle given two angles are 100 degrees.
October 31, 2024
The unknown angle in a triangle, formed by two slanted lines and a vertical line, with two given angles of 80 degrees each, is calculated to be 20 degrees using the triangle angle sum property.
Solve for x in the equation x^2 + 3x + 7 = 6 / (x^2 + 3x + 2)
October 31, 2024
The equation x^2 + 3x + 7 = 6/(x^2 + 3x + 2) is solved by substituting u = x^2 + 3x, resulting in a quadratic equation in u. Factoring the quadratic equation yields two possible values for u, which are then substituted back into the substitution to find the solutions for x using the quadratic formula. One case results in two real solutions, while the other yields no real solutions.
Solve for x in a radical equation.
October 30, 2024
The solution to the equation \sqrt{7 + \frac{3}{\sqrt{x}}} = 7 - \frac{9}{x} is x = \frac{9}{4}.
Find the value of x^10 / x^10
October 30, 2024
The solution involves finding an expression for X_n, a sum of reciprocals of powers of x, using the formula for a finite geometric series. Then, the expression for x^n is used to simplify the ratio x^n / X_n, ultimately resulting in x^(n+1).
Find the value of x given two angles that form a right angle.
October 30, 2024
To find x, supplementary angles 5x and 4x are used, along with the fact that the sum of the interior angles of a quadrilateral is 360 degrees. Solving the equation 9x = 180 yields x = 20.