Respuesta:
Explicación paso a paso:
Datos del problema:
x= 2 y=3 z=4
Resolución:
a.
3x-5y+8z
3(2)-5(3)+8(4)
6-15+32
-9+32
23
b.
[tex]2x^{4} -3y^{3} +8z^{2}[/tex]
[tex]2(2)^{4}-3(3)^{3}+8(4)^{2}[/tex]
2 . 16 - 3 . 27 + 8 . 16
32 - 81+ 128
-49+128
79
c.
[tex]\frac{1}{2} x + \frac{2}{6}y - \frac{2}{8} z\\\\\frac{1}{2}(2)+ \frac{2}{6}(3)-\frac{2}{8}(4)\\\\\frac{2}{2}+\frac{6}{6}-\frac{8}{8}\\\\\\1+1-1\\\\\\2-1\\\\1[/tex]
d.
[tex]\frac{2}{3} x^{2} -\frac{1}{5}y^{2}+\frac{1}{12} z^{2} \\\\\\\frac{2}{3}(2)^{2} -\frac{1}{5} (3)^{2} + \frac{1}{12} (4)^{2}\\\\\\\frac{2}{3} . (4) - \frac{1}{5} . (9) + \frac{1}{12} . (16)\\\\\frac{8}{3}-\frac{9}{5} + \frac{16}{12}\\\\\frac{8}{3} - \frac{9}{5} + \frac{8}{6}\\\\\\\frac{80-54+40}{30}\\\\\frac{66}{30} \\\\\frac{33}{15} \\\\\frac{11}{15}[/tex]
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Verified answer
Respuesta:
Explicación paso a paso:
Datos del problema:
x= 2 y=3 z=4
Resolución:
a.
3x-5y+8z
3(2)-5(3)+8(4)
6-15+32
-9+32
23
b.
[tex]2x^{4} -3y^{3} +8z^{2}[/tex]
[tex]2(2)^{4}-3(3)^{3}+8(4)^{2}[/tex]
2 . 16 - 3 . 27 + 8 . 16
32 - 81+ 128
-49+128
79
c.
[tex]\frac{1}{2} x + \frac{2}{6}y - \frac{2}{8} z\\\\\frac{1}{2}(2)+ \frac{2}{6}(3)-\frac{2}{8}(4)\\\\\frac{2}{2}+\frac{6}{6}-\frac{8}{8}\\\\\\1+1-1\\\\\\2-1\\\\1[/tex]
d.
[tex]\frac{2}{3} x^{2} -\frac{1}{5}y^{2}+\frac{1}{12} z^{2} \\\\\\\frac{2}{3}(2)^{2} -\frac{1}{5} (3)^{2} + \frac{1}{12} (4)^{2}\\\\\\\frac{2}{3} . (4) - \frac{1}{5} . (9) + \frac{1}{12} . (16)\\\\\frac{8}{3}-\frac{9}{5} + \frac{16}{12}\\\\\frac{8}{3} - \frac{9}{5} + \frac{8}{6}\\\\\\\frac{80-54+40}{30}\\\\\frac{66}{30} \\\\\frac{33}{15} \\\\\frac{11}{15}[/tex]