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2007-04-04 01:45:04 · 8 answers · asked by the great martins 1 in Science & Mathematics ➔ Mathematics
I assume 2^x means x²
x² = 4x
(4)² = 4(4)
16 = 16
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2007-04-04 02:32:20 · answer #1 · answered by SAMUEL D 7 · 0⤊ 1⤋
Yeah,
Since 4x is a power of 2 and 4 itself is 2^2
Its quite obvious that x= 2^y where y is some integer.
This means:
2^x= 2^2*(2^y)
2^x=2^(y+2) {Law of indices}
This means x=y+2
But x= 2^y
=] 2^y =y+2
This is possible only if y=2
This in turn means x=4 is the solution.
2007-04-04 01:58:24 · answer #2 · answered by ♠ Author♠ 4 · 0⤊ 0⤋
8
2007-04-04 01:50:39 · answer #3 · answered by Anonymous · 0⤊ 1⤋
It's 4.....
16=16
2007-04-04 01:49:56 · answer #4 · answered by Kat 5 · 1⤊ 0⤋
if you mean 2 to the power of x then x=2
2007-04-04 01:48:53 · answer #5 · answered by Anonymous · 0⤊ 3⤋
2^x=4x
2^x=2^2 * x
2^(x-2)=x
by trial and error we can get x as 4 because
2^(4-2)=4
2^(2)=4 is correct.
Therefore x=4
2007-04-04 01:54:01 · answer #6 · answered by Afeef 2 · 0⤊ 0⤋
2^4 = 4(4) = 16
hope this helps..
2007-04-04 01:50:33 · answer #7 · answered by ngweekiang 1 · 1⤊ 0⤋
x = 4
HTH
Charles
2007-04-04 01:52:05 · answer #8 · answered by Charles 6 · 0⤊ 0⤋