Curry
  • Curry
ln(3x+4)-ln(2x+1)=5
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
; OTL. either way. log rules so. that equals: ln( (3x+4) /( 2x+1 ) ) =5 (3x+4)/(2x+1) = e^5. you can solve from here :)
Curry
  • Curry
i did and i got 0.49149 but when i plug it back in i get 2 as my asnwer
Curry
  • Curry
whay did i do wrong

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anonymous
  • anonymous
Very close. missing a negative sign. it's -0.49.... i'll leave you to find out the negative sign unless you want to show working
Curry
  • Curry
ooo nvm i found it
dumbcow
  • dumbcow
ok so 3x+4 = e^5(2x+1) 4-e^5 = x(2e^5 -3) x = (4-e^5)/(2e^5-3) = -.49149

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