Oblicz x jeśli: a) log x 81=4 b) log x 3=1/2 c) log x 2 =1/3 d) log x 1/9 = -2
a)
log x 81=4
x^4 = 81
x^4 = 3^4
x = 3
b)
log x 3=1/2
x^(1/2) = 3
x^(1/2) = 9^(1/2)
x = 9
c)
log x 2 =1/3
x^(1/3) = 2
∛x = 2
x = 2²
x = 8
d)
log x 1/9 = -2
x^(-2) = 1/9
x^(-2) = 3^(-2)
a) x⁴=81
x= 3
√x= 3
x= 9
∛x= 2
x= 8
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a)
log x 81=4
x^4 = 81
x^4 = 3^4
x = 3
b)
log x 3=1/2
x^(1/2) = 3
x^(1/2) = 9^(1/2)
x = 9
c)
log x 2 =1/3
x^(1/3) = 2
∛x = 2
x = 2²
x = 8
d)
log x 1/9 = -2
x^(-2) = 1/9
x^(-2) = 3^(-2)
x = 3
a) x⁴=81
x= 3
b)
√x= 3
x= 9
c)
∛x= 2
x= 8
d)