Question

calcule o valor das expressões
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Answer 1

a)

${( {3}^{- 3}) }^{3} = {3}^{ - 9}$

b)

${5}^{x + 3} \times {5}^{x - 3} = \\ (x + 3) + (x - 3) = \\ x + 3 + x - 3 = 2x$

c)

${3}^{2m} \div {3}^{1 - m} = \\ 2m - (1 - m) = \\ 2m - 1 + m = \\ 3m - 1 = \\ 3m = 1 \\ m = \frac{1}{3}$

d)

$( {7}^{a} \times {7}^{a + 1} ) \div {7}^{a + 2} \\ (a + (a + 1)) - (a + 2) = \\ (a + a + 1) - a - 2 = \\ 2a + 1 - a - 2 = \\ a - 3 = \\ a = 3$

e)

$\frac{ { ({m}^{2}) }^{ \times - 1} \times {( {m}^{3}) }^{x + 1} }{ {m}^{5x} } \\.................... \\ \frac{ {m}^{2x - 2} \times {m}^{3x + 3} }{ {m}^{5x} } \\ 2x - 2 + 3x + 3 - 5x = 0 \\ 5x - 5x + 1 = 1$

Answer 2

Resposta:

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Explicação passo-a-passo:

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