Question

Calcule o valor de x em cada caso: Me ajuda pfv

Answer 1

Resposta:

a)

${2}^{x} = 64 \\ {2}^{x} = 2 {}^{6} \\ x = 6$

b)

${2}^{x} = 8 \\ {2}^{x} = 2 {}^{ 3} \\ x = 3$

c)

${x}^{3} = 125 \\ x {}^{3} = 5 {}^{ 3} \\ x = 5$

d)

$2 {}^{3} = x \\ x = 8$

e)

${x}^{4} = 16 \\ x {}^{4} = 2 {}^{4} \\ x = 2$

f)

$({ \frac{1}{2} })^{x} = 4 \\( 2 {}^{ - 1} ) {}^{x} = 2 {}^{2} \\ 2 {}^{ - x} = 2 {}^{2} \\ - x = 2 \\ x = - 2$

g)

${5}^{2} = x \\ x = 25$

h)

${3}^{1} = x \\ x = 3$

i)

${x}^{4} = 81 \\ {x}^{4} = {3}^{4} \\ x = 3$