∫ from -∞ to ∞ of e^(-x^2) dx = √π f(x) = a₀ + Σ from n=1 to ∞ of (aₙ cos nπx / L + bₙ sin nπx / L) x = -b ± √(b^2 – 4ac) / 2a
Answer: The integral evaluates to $\sqrt{\pi}$, and the quadratic formula is used to find the roots of the quadratic equation. Explanation: The integral $\int_{-\infty}^{\infty} e^{-x^2} dx$ is a well-known Gaussian integral, which equals $\sqrt{\pi}$. The series expansion of a function involving cosine and sine terms suggests the use of Fourier series or the general form […]
∫ from -∞ to ∞ of e^(-x^2) dx = √π f(x) = a₀ + ∑ from n=1 to ∞ of (aₙ cos nπx / L + bₙ sin nπx / L) x = -b ± √(b^2 – 4ac) / 2a
Answer: The integral evaluates to $\sqrt{\pi}$, and the quadratic formula is used to solve for $x$ in the second equation. Explanation: The first integral, $\int_{-\infty}^{\infty} e^{-x^2} dx$, is a well-known Gaussian integral, which evaluates to $\sqrt{\pi}$. This integral is fundamental in probability theory and statistics, especially related to the normal distribution. The second formula is […]
n = c / v = (με / μoεo) = Z(vacuum) / Z(dielectric) Ir / Ii = (Er / Ei)^2 = ((1 – n) / (1 + n))^2 I1 / Ii = Zi Ei^2 / Zi Ei^2 = 4n / (1 + n)^2
Answer: The equations describe the relationships between the internal and external currents and voltages in a transformer, based on the transformer equations and electromagnetic induction principles. Explanation: The formulas involve the transformer equations, which relate the primary and secondary currents and voltages through the turns ratio \( n \). They also incorporate concepts from electromagnetic […]
∫ from -∞ to ∞ of √(√(x^n)+1) / (α + β^x) dx
Answer: The integral diverges (does not converge to a finite value). Explanation: This problem involves analyzing the behavior of an improper integral with an integrand that contains exponential and polynomial expressions. The key concepts involved are the properties of exponential functions, polynomial growth, and the convergence criteria of improper integrals. Specifically, the integral’s convergence depends […]
∫ from -∞ to ∞ of √(√(x^n) + 1) / (α + β^x) dx
Answer: The integral diverges (does not converge to a finite value). Explanation: This problem involves analyzing the behavior of an improper integral at infinity, specifically the integral of a function involving a square root of a ratio with exponential and polynomial expressions. The key concepts involved are the asymptotic behavior of functions, comparison test for […]
EXAMPLES 11 + x ______ x^3 + 2x(5 – x)
Answer: The simplified form of the expression is \(\frac{11 + x}{x^3} + 10 – 2x\). Explanation: This problem involves algebraic simplification, specifically combining rational expressions and polynomial terms. The key concepts include the properties of fractions, distributive property, and combining like terms. The goal is to write the expression in a simplified, more manageable form. […]
Find m ∠ BOC
Answer: \(\angle BOC = 110^\circ\) Explanation: This problem involves the properties of circles, inscribed angles, and central angles. The key concept here is that the measure of an inscribed angle is half the measure of the intercepted arc, and the measure of a central angle is equal to the measure of the intercepted arc. The […]
11 PQR measures 75°, what is the measure of ∠SQR? ○ 22° ○ 45° ○ 53° ○ 97°
Answer: 53° Explanation: This problem involves the concept of supplementary angles and the properties of linear pairs. When two angles form a linear pair, they are supplementary, meaning their measures add up to 180°. The problem states that the measure of angle PQR is 75°, and asks for the measure of angle ∠QRS, which is […]
The correct answer is: **C. 2**
Explanation: Let’s evaluate the expression step-by-step: Expression: \( 9 – 3 \div \frac{1}{3} + 1 \) Order of operations (PEMDAS/BODMAS): Division Subtraction and addition (left to right) Steps: Calculate \( 3 \div \frac{1}{3} \): \(\div \frac{1}{3}\) is equivalent to multiplying by 3: \[ 3 \times 3 = 9 \] Now substitute back into the expression: […]
The answer is: 45
Explanation: This problem involves recognizing a pattern or rule that relates the two numbers on the left to the number on the right. It is not a straightforward addition, subtraction, multiplication, or division. Instead, it appears to involve a hidden relationship or a pattern based on the digits or some operation involving the numbers. Steps: […]