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Beliebt Algebra >

sum from n=1 to 42 of 2n-2

Lösung

n = 1 \sum 42 2 n - 2

Lösung

1722

Schritte zur Lösung

n = 1 \sum 42 2 n - 2

Wende die Summenregel an:

\sum a_{n} + b_{n} = \sum a_{n} + \sum b_{n}

= n = 1 \sum 42 2 n - n = 1 \sum 42 2

n = 1 \sum 42 2 n = 1806

n = 1 \sum 42 2 = 84

= 1806 - 84

= 1722

Beliebte Beispiele

solvefor D,D=((40.5g))/((15ml))

so l v e f or D, D = \frac{( 40.5 g )}{( 15 m l )}

quadraticformula x(x-1)=0

q u a d r a t i c f or m u l a x (x - 1) = 0

faktorisieren 5x^2-32x+12

f a c t or 5 x^{2} - 32 x + 12

solvefor x,8x-5=6x+3

so l v e f or x, 8 x - 5 = 6 x + 3

solvefor x,3^x=30

so l v e f or x, 3^{x} = 30