∫ calculus

1. **State the problem:** We need to find the limit $$\lim_{x \to a} 2 \sin x$$. 2. **Recall the limit property:** The sine function is continuous everywhere, so $$\lim_{x \to a} \

1. **Problem a:** Find the derivative of $f(x) = (\tan x)^x$ with domain $D_f = ]0, \frac{\pi}{2}[$ using logarithmic differentiation. 2. Take the natural logarithm of both sides:

1. **State the problem:** We need to evaluate the definite integral $$\int_0^{\frac{\pi}{6}} x \sin(2x) \, dx$$. 2. **Use integration by parts:** Let $$u = x$$ and $$dv = \sin(2x)

1. **State the problem:** We want to evaluate the integral $$\int_1^{\infty} (4 + 2x + 6x^2) e^{-(5 + 4x + x^2 + 2x^3)} \, dx.$$\n\n2. **Analyze the integrand:** The integrand is a

1. The problem is to evaluate the definite integral $$\int_1^e \frac{1}{x^3} \, dx$$. 2. Rewrite the integrand using a negative exponent: $$\frac{1}{x^3} = x^{-3}$$.

1. The problem is to evaluate the definite integral $$\int_e^1 \frac{1}{x^3} \, dx$$. 2. Rewrite the integrand as $$x^{-3}$$ to make integration easier.

1. **Problem a:** Find local extrema, global max, and min of $f(x) = x^4 - 3x^3 + x^2 - 5$ on $[-5,5]$. 2. Compute derivative:

1. **State the problem:** Find the $n^{th}$ order derivative of the function $$y = \sin(5x) \cdot \cos(3x).$$ 2. **Use product rule:** Since $y$ is a product of two functions, $u =

1. **State the problem:** We need to find the derivative $\frac{dy}{dx}$ of the function $$y = 4x^{8} + 4 \sqrt{x} - 5 + \frac{3}{x^{\frac{8}{5}}}.$$\n\n2. **Rewrite the function f

1. **State the problem:** Find the $n$th derivative of the function $$f(x) = \frac{1}{(x-1)(x-2)(x-3)}.$$\n\n2. **Rewrite the function:** We have $$f(x) = \frac{1}{(x-1)(x-2)(x-3)}

1. **State the problem:** We want to find the limit as $x$ approaches 0 of the expression $$\frac{a - \sqrt{a^2 - x^2}}{x}.$$ 2. **Understand the expression:** The numerator is $a

1. **Problem statement:** Find all local extrema, the global maximum, and the global minimum of the functions: c) $$f(x) = e^{-\frac{x^2}{2}}$$

1. **Problem statement:** Find all local extrema, the global maximum, and the global minimum of the function \(f(x) = 4 - |x - 3|\) on the domain \([-5, 5]\). 2. **Understand the f

1. **Problem statement:** Find all local extrema, global maximum, and global minimum of each function on the domain $[-5,5]$. ---

1. **Problem statement:** A woman wants to travel from point A to point C on opposite sides of a circular lake with radius $r=3$ km. She can walk along the shore at 8 km/h and row

1. Problem: Find $\lim_{x \to +\infty} \cos \left(\frac{1}{x}\right)$. As $x \to +\infty$, $\frac{1}{x} \to 0$. Since cosine is continuous,

1. Problem: Evaluate the limit $$\lim_{x \to 0} x$$. Since the function is simply $x$, as $x$ approaches 0, the value approaches 0.

1. **State the problem:** Find the area between the x-axis and the curve given by the function $$y = 4x - x^2$$. 2. **Identify the points of intersection:** The area between the cu

1. **State the problem:** Evaluate the definite integral $$\int_6^9 \frac{3\sqrt{x} - 2}{4\sqrt{x}} \, dx.$$\n\n2. **Rewrite the integrand:** Recall that $$\sqrt{x} = x^{\frac{1}{2

1. **State the problem:** We are given the derivative of a function $y = f(x)$ as $$\frac{dy}{dx} = 3x + A\sqrt{x}$$ where $A$ is a constant, and the curve has a stationary point a

1. We are asked to evaluate the integral $$\int (\cos 5x + 4 \sec^2 x + 8 e^{4x} + \frac{2}{x}) \, dx.$$\n\n2. We can split the integral into the sum of integrals:\n$$\int \cos 5x