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xx-intercept of the Graph of a Logarithmic Function

The xx-intercept of the graph of a basic logarithmic function y=logaxy = \log_a x is always located at the coordinate point (1,0)(1, 0). This means the logarithmic curve will consistently cross the horizontal xx-axis exactly at x=1x = 1. This graphical property is valid for any base because setting the function's output to zero, 0=loga10 = \log_a 1, is mathematically equivalent to the exponential expression a0=1a^0 = 1, which is an inherently true statement for any permissible base aa.

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Updated 2026-05-25

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Ch.10 Exponential and Logarithmic Functions - Intermediate Algebra @ OpenStax

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