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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.