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saifoo.khan
 4 years ago
Logarithms
saifoo.khan
 4 years ago
Logarithms

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oPENstUDYuSER
 4 years ago
Best ResponseYou've already chosen the best response.0I thought you were soo smart, that you would know them by now. LOL jk jk.

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1Lol. I'm not a calculator. I can get stuck too! :P @OpenstudyUser

oPENstUDYuSER
 4 years ago
Best ResponseYou've already chosen the best response.0Try distributing.

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1\[ \Large 9^{2x} + 2(9^{x+1}) = 40 \] Correction^

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1Just tell me the next and step after that please.

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1write 9^(x+1) as 9^x.9 then put y=9^x. solve the quadratic

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1DANG!!! KILL ME!!!! My teacher told me that. _ Thanks for recalling @hartnn

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1Just guessing, can't we do it like this? \[9^{2x} + 2(9^x \times 9) = 40\] Ans so on?

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1didn't i tell u to do just that?

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1Yes, but you said me to write 9^x = y Got that. But can't we solve it by another way? Something like: \[9^{2x} + 2(9^x)\times 18=40\]

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1nopes, i don't think so....no formula for log(a+b) or log (ab)

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1Did you missed a +sign in your first step? @micahwood50

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1@OpenstudyUser kept on distributing. :D

oPENstUDYuSER
 4 years ago
Best ResponseYou've already chosen the best response.0I atleast tried _

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Just do what hartnn told you to do.

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1I want to learn your method too! @micahwood50

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0My "method" is incorrect. I just though lnab = ln (a + b), but it's actually lna + lnb so forgot it.

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1Oh. No problem. Thanks for trying though. :)

saifoo.khan
 4 years ago
Best ResponseYou've already chosen the best response.1I solved it @hartnn . got: x = 0.315

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1what roots of quadratic did u get?

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1yup. can't be 20 so 9^x=2 x=0.315 u are correct!
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