Question

hallar valor numérico de las expresiones considerando que
a=-1 b=2 c=-2
ayuda!!​

Answer 1

Respuesta:

a)

$- a + 2b - 3c = \\ - ( - 1) + 2(2) - 3( - 2) = \\ 1 + 4 + 6 = 11$

b)

$\frac{ 1}{2} {a}^{3} bc + 4a {b}^{2} - \frac{ab {}^{2} }{c} = \\ \\ \frac{1}{2} ( - 1) {}^{3} (2)( - 2) + 4( - 1)(2 {)}^{2} - \frac{( - 1)(2 {}^{2} }{( - 2)} = \\ \\ 2 - 16 - 2 = - 16$

c)

$\frac{ - b {}^{3}c {}^{2} }{8} + \frac{3}{4} a {}^{4} c {}^{2} - 0.3ab {}^{2} \\ \\ \frac{ - (2) {}^{3}( - 2 {)}^{2} }{8} + \frac{3}{4} ( - 1) {}^{4} ( - 2 ){}^{2} - 0.3( - 1)(2 {)}^{2} \\ \\ \frac{2 {}^{5} }{8} + 3 + 1.2 \\ \\ \frac{ - 32}{8} + 3 + 1.2 \\ \\ - 4 + 3 + 1.2 = 0.2$

d)

$\sqrt{ab {}^{3}c {}^{3} } + \frac{3}{2} abc {}^{4} - 10 \\ \\ \sqrt{( - 1)(2) {}^{3} {( - 2)}^{3} } + \frac{3}{2} ( - 1)(2)( - 2) {}^{4} - 10 \\ \\ \sqrt{4 {}^{3} } - 3(16) - 10 \\ \\ 2 {}^{3} - 48 - 10 \\ 8 - 48 - 10 \\ - 50$

Answer 2

A) 11 esa la respuenta