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Need help with solving problem
Posted:
Nov 26, 1996 3:40 AM


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+y2=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 Email an answer to: ingimar.volundarson@mailbox.swipnet.se
Thanx in advance!



