Rules for Indefinite Integrals

This page covers essential rules for calculating unbestimmte Integrale (indefinite integrals). These rules form the foundation for more complex integration techniques.

Vocabulary:

• Potenzregel (Power Rule)
• Summenregel (Sum Rule)
• Faktorregel (Constant Multiple Rule)
• Sinus- und Cosinusregel (Sine and Cosine Rule)
• Substitutionsregel (Substitution Rule)

Each rule is presented with its mathematical formulation and examples of its application. The power rule, for instance, is given as ∫x^n dx = $x^(n+1)$/$n+1$ + C for n ≠ -1.

Example: Using the power rule, ∫x² dx = $1/3$x³ + C.

The page also introduces the substitution rule for more complex integrals involving composite functions. This rule is crucial for solving integrals that cannot be directly solved using basic rules.

Highlight: The substitution rule is particularly useful for integrals of the form ∫f(g$x$)g'$x$dx, where a change of variable simplifies the integration process.

Definite Integrals

This page introduces the concept of bestimmte Integrale (definite integrals) and their geometric interpretation as the area under a curve.

Definition: A definite integral is an integral with specified upper and lower limits of integration, representing a specific area under a curve.

The notation for definite integrals is presented as ∫[a to b] f$x$dx = [F$x$]^b_a = F$b$ - F$a$, where a and b are the lower and upper limits of integration, respectively.

Example: The definite integral ∫$-1 to 2$ $x-2$dx is calculated step-by-step, demonstrating how to apply the fundamental theorem of calculus.

The page also illustrates the concept of upper and lower sums, which are used to approximate the area under a curve before introducing the definite integral as the exact area.

Highlight: Definite integrals can represent both positive and negative areas, depending on the function and the interval of integration.

Rules for Definite Integrals

This final page covers important rules and properties specific to bestimmte Integrale (definite integrals), enhancing the understanding of their behavior and calculation methods.

Key rules presented include:

1. Zero integral when upper and lower limits are the same
2. Interval additivity
3. Sign change when swapping integration limits
4. Constant multiple rule
5. Sum rule

Example: The interval additivity rule is demonstrated: ∫[a to b] f$x$dx + ∫[b to c] f$x$dx = ∫[a to c] f$x$dx

These rules are crucial for simplifying complex definite integral calculations and understanding the properties of definite integrals.

Highlight: The sign change rule, ∫[a to b] f$x$dx = -∫[b to a] f$x$dx, is particularly useful when dealing with integrals where the limits need to be swapped.

The page concludes with practical examples applying these rules, reinforcing their application in solving definite integral problems.

Vocabulary: Intervalladditivität (Interval Additivity) - A key property of definite integrals that allows breaking down integrals over larger intervals into sums of integrals over smaller intervals.

Introduction to Integral Calculus

This page introduces the concept of integral calculus and its relationship to differentiation. It explains the fundamental idea of finding antiderivatives, also known as indefinite integrals.

Definition: Integration is the process of calculating integrals, which is the reverse operation of differentiation.

The page illustrates the connection between derivatives and antiderivatives, showing how integrating (or "anti-differentiating") a function leads to its antiderivative.

Example: For the function f$x$ = 2x, the antiderivative F$x$ = x² + C, where C is a constant.

The concept of unbestimmte Integrale (indefinite integrals) is introduced, emphasizing that there are infinitely many antiderivatives for a given function, differing only by a constant.

Highlight: The notation for indefinite integrals is ∫f$x$dx = F$x$ + C, where C is an arbitrary constant of integration.