MATEMÁTICA SEM PALAVRAS

Somas com um nº finito de parcelas: applets 2D

1.	1 + 2 + 3 + ... + n = ?   [>>]
2.	1 + 3 + 5 + ... + (2n-1) = ?   [>>]
3.	1 + 2 + 3 + ... + (n-1) + n + (n-1) + ... + 3 + 2 + 1 = ?   [>>]
4.	1 + 3 + 5 + ... + (2n-3) + (2n-1) + (2n-3) + ... + 5 + 3 + 1 = ?   [>>]
5.	(1 + 2 + 3 + ... + n) + (1 + 2 + 3 + ... + (n-1)) = ?   [>>]
6.	12 + 22 + 32 + ... + n2 = ?   [>>]
7.	12 - 22 + 32 - 42 + 52 ... + (-1)n+1n2 = ?   [>>]
8.	13 + 23 + 33 + 43 + ... + n3 = ?   [>>]
9.	(n+1) + (n+2) + ... + (n+n) = ?   [>>]
10.	n + (n+1) + (n+2) + ... + (n+(2n-2)) = ?   [>>]
11.	(2n+1) + (2n+3) + ... + (2n+(2n-1)) = ?   [>>]
12.	( 1 + 2 + 3 + ... + n ) + ( 2 + 3 + ... + n ) + ( 3 + ... + n ) + ... + ( (n-1) + n ) + ( n ) = ?   [>>]
13.	1 + 4x2 + 8x2 + 12x2 + ... + (4n)x2 = ?   [>>]

applets 3D