dharazzz
dharazzz
03-07-2016
Mathematics
contestada
find cube of
a)-0.16
b)-2/7
c)14
Respuesta :
NiedzielnyMatematyk
NiedzielnyMatematyk
03-07-2016
a) [tex](-0.16)^3 = (-0.16)\cdot(-0.16)\cdot (-0.16) = -\frac{16}{100}\cdot\frac{16}{100}\cdot\frac{16}{100}=[/tex]
[tex] = -\frac{16^3}{100^3} = -\frac{2^{12}}{10^6} = -\frac{4\cdot 2^{10}}{10^6} = -\frac{4096}{1000000} = -0.004096[/tex]
b) [tex]\left(-\frac{2}{7}\right)^3 = -\frac{2^3}{7^3} = -\frac{8}{343}[/tex]
c) [tex]14^3 = (2\cdot 7)^3 = 2^3\cdot 7^3 = 8\cdot 343 = 2744[/tex]
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