need some help with these questions PLEASE 1. solve the equation 0.5 ^(1+3x)=7 giging you answer to 2 decimal places 2. log (5x) - log(1/x+1)=2log(2x+2)
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Originally Posted by pal4499 need some help with these questions PLEASE 1. solve the equation 0.5 ^(1+3x)=7 giging you answer to 2 decimal places 2. log (5x) - log(1/x+1)=2log(2x+2) to #1: to #2: Unfortunately the writing isn't clear. I assume that you mean: Solve for x: Keep in mind that the log-function is defined for positive values only and therefore x = -1 is not a solution of this equation! EDIT: Removed a mistake
Last edited by earboth; Nov 4th 2008 at 12:14 PM.
i may have written the question out wrong!! (1) 0.5(1+3x)=7
Originally Posted by pal4499 i may have written the question out wrong!! (1) 0.5(1+3x)=7 Remember that .... So I've done your question in my previous post. I didn't give you the approximative number because I was pretty sure that you can calculate it yourself. For confirmation EDIT: I've corrected my previous post. Have a look!
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