Question

ayuda por favor (ㆁωㆁ)​

Answer 1

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.

$2x^{4} -3y^{3} +8z^{2}$

$2(2)^{4}-3(3)^{3}+8(4)^{2}$

2 . 16 - 3 . 27 + 8 . 16

32 - 81+ 128

-49+128

79

c.

 $\frac{1}{2} x + \frac{2}{6}y - \frac{2}{8} z\\\\\frac{1}{2}(2)+ \frac{2}{6}(3)-\frac{2}{8}(4)\\\\\frac{2}{2}+\frac{6}{6}-\frac{8}{8}\\\\\\1+1-1\\\\\\2-1\\\\1$

d.

$\frac{2}{3} x^{2} -\frac{1}{5}y^{2}+\frac{1}{12} z^{2} \\\\\\\frac{2}{3}(2)^{2} -\frac{1}{5} (3)^{2} + \frac{1}{12} (4)^{2}\\\\\\\frac{2}{3} . (4) - \frac{1}{5} . (9) + \frac{1}{12} . (16)\\\\\frac{8}{3}-\frac{9}{5} + \frac{16}{12}\\\\\frac{8}{3} - \frac{9}{5} + \frac{8}{6}\\\\\\\frac{80-54+40}{30}\\\\\frac{66}{30} \\\\\frac{33}{15} \\\\\frac{11}{15}$