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Topic: Need help with solving problem
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Ingimar Völundarson

Posts: 1
Registered: 12/7/04
Need help with solving problem
Posted: Nov 26, 1996 3:40 AM
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Can anyone help me with this problem?

(4^x)+(2^x)-2=0

Everyone can see that x=0 but:

(4^x)+(2^x)-2=0 =>
2*(2^x)+(2^x)-2=0 =>
2y+y-2=0 => ;(let y=2^x)
3y=2 =>
y=2/3 =>
2^x=2/3 => ;(let 2^x=y)
lg(2^x)=lg(2/3) =>
x*lg(2)=lg(2/3) =>
x=lg(2/3)/lg(2) Which is not true!!!

Am I doing something wrong?

Please E-mail an answer to:
ingimar.volundarson@mailbox.swipnet.se

Thanx in advance!








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