If the graph of
y = log b x
passes through the point (8; 2), the value of b is
"y=log_ {b}x\\\\\nb>0, b\\not =1, x>0\\\\\n(8,2)\\\\\n2=log_{b}8\\\\\n8=b^{2}\\\\\nb=\\sqrt{8}\\\\\nb=2\\sqrt2"
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