help please, i'm not sure how to solve this question. i know i need to use change of base, but i'm still confused. solve equation, check for extraneous roots 2^x + 12(2)^-x = 7
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Hello extraordinarymachine Originally Posted by extraordinarymachine help please, i'm not sure how to solve this question. i know i need to use change of base, but i'm still confused. solve equation, check for extraneous roots 2^x + 12(2)^-x = 7 Multiply both sides by and re-arrange: Can you complete it now? Grandad
Originally Posted by extraordinarymachine help please, i'm not sure how to solve this question. i know i need to use change of base, but i'm still confused. Originally Posted by extraordinarymachine solve equation, check for extraneous roots 2^x + 12(2)^-x = 7 Hi all
Last edited by mrmohamed; Dec 1st 2009 at 11:02 AM.
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