Question

jeżeli log x \frac{1}{64} = -4 to liczba x jest równa ... ?

Answer 1

 

log x [1/64] = - 4

x^(-4) = 1/64

1/x^4 = 1/64

x^4 = 64

x^2 = 8

x =  8^(1/2) = [4*2]^)1/2) = 4^(1/2)* 2^(1/2) = 2* 2^(1/2)

x = 2 *2^(1/2)

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lub  x = 2 p(2)

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p(2) <-- pierwiastek kwadratowy z 2

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