What is the x-intercept of F(x) = log2x?

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What is the x-intercept of F(x) = log2x?

2007-04-06 15:57:45 · 5 answers · asked by theweirdguy1 2 in Science & Mathematics ➔ Mathematics

5 answers

y=log2x
x-intercept means y=0 (note y-intercept means x=0)
0=log2x
2x=10^0
2x=1
x=1/2
x intercept is (1/2,0)
good luck

2007-04-06 16:00:47 · answer #1 · answered by Helper 6 · 0⤊ 0⤋

Is it log(2x) or log(base 2) of x? The x intercept of the log function to any base is always (1,0), since a^0 = 1 for all a<>0, so log (base a) 1 = 0.

2007-04-06 23:03:45 · answer #2 · answered by Philo 7 · 0⤊ 0⤋

0 = log2x

10^0 = 2x = 1

x = 0.5

2007-04-06 23:02:27 · answer #3 · answered by ǝɔnɐs ǝɯosǝʍɐ Lazarus'd- DEI 6 · 0⤊ 0⤋

f-1(x) = 2x.

2007-04-06 23:05:31 · answer #4 · answered by dr_james_wright 1 · 0⤊ 0⤋

(1/2,0)

2007-04-06 23:04:38 · answer #5 · answered by cason90 1 · 0⤊ 0⤋