integral from-2 to-1 of e^{-x}

Lösung

\int_{- 2}^{- 1} e^{- x} d x

e^{2} - e

Dezimale

4.67077 \dots

Schritte zur Lösung

\int_{- 2}^{- 1} e^{- x} d x

Wende U-Substitution an

= \int_{2}^{1} - e^{u} d u

\int_{a}^{b} f (x) d x = - \int_{b}^{a} f (x) d x, a < b

= - \int_{1}^{2} - e^{u} d u

Entferne die Konstante:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= - (- \int_{1}^{2} e^{u} d u)

Nutze das gemeinsame Integral :

\int e^{u} d u = e^{u}

= - (- [e^{u}]_{1}^{2})

Vereinfache

= [e^{u}]_{1}^{2}

Berechne die Grenzen:

e^{2} - e

= e^{2} - e

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