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Beliebt Rechnen >

sum from n=3 to infinity of 1/(n(n+1))

Lösung

n = 3 \sum \infty \frac{1}{n ( n + 1 )}

Lösung

\frac{1}{3}

+1

Dezimale

0.33333 \dots

Schritte zur Lösung

n = 3 \sum \infty \frac{1}{n ( n + 1 )}

Teleskopreihen-Test anwenden:

\frac{1}{3}

= \frac{1}{3}

Beliebte Beispiele

integral of (ae^θ+b)/(ae^θ-b)

\int \frac{a e ^{θ} + b}{a e ^{θ} - b} d θ

y= 1/(1+e^{-x)}

y = \frac{1}{1 + e ^{- x}}

(\partial)/(\partial x)(e^{2x}sin(2y))

\frac{\partial}{\partial x} (e^{2 x} sin (2 y))

limit as x approaches 2 of (x^2-4)/(x+2)

x \to 2 lim (\frac{x ^{2} - 4}{x + 2})

2x^{''}-3x^'+x=0

2 x^{^{''}} - 3 x^{^{'}} + x = 0