Seudónimo
Seudónimo
20-02-2015
Mathematics
contestada
4+8+12+... + 4n=2n(n+1)
Respuesta :
Panoyin
Panoyin
21-02-2015
4 + 8 + 12 + 4n = 2n(n + 1)
24 + 4n = 2n(n) + 2n(1)
24 + 4n = 2n² + 2n
-2n -2n
24 = 2n²
24
=
2n²
2 2
12 = n²
√12 = n
√4 × 3 = n
√4 √3 = n
2 √3 = n
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