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Vague
 one year ago
Best ResponseYou've already chosen the best response.0\[f(x)=\log _{4}(x+2) AND g(x)=\log_{4}(2x5), please find f(x)=g(x)\]

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2use the fact that if log A =logB then A =B can you find an equation in 'x' using that ?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0If log a = log b then a = b

Joseph91
 one year ago
Best ResponseYou've already chosen the best response.0f(x)=g(x) implies x+2=2x5 x=7

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2for any base, (base of 4 doesn't matter here)

Vague
 one year ago
Best ResponseYou've already chosen the best response.0Well, the answer is {7}, (log4(9))

Vague
 one year ago
Best ResponseYou've already chosen the best response.0I honestly have no idea how to solve that out, it's review and I can't find it in my notes.

harsimran_hs4
 one year ago
Best ResponseYou've already chosen the best response.0for any log expressions with same base to be equal e.g log a = log b be it any base a = b for you just have to simply work out a linear equation

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2can you clearly post your question ? a screenshot will be wonderful....

Vague
 one year ago
Best ResponseYou've already chosen the best response.0Solve the problem. 1 2 ) f(x) = log4(x + 2) and g(x) = log4( 2 x  5) . Solve f(x) = g(x). 1 2 ) A) {7} , (7, log4(7) ) B) {7} , (7, log4(9) ) C) {7} , (7, log4(2) ) D) No solution. A n s w e r : B

Vague
 one year ago
Best ResponseYou've already chosen the best response.0It's the best I can do, sorry. And when you solve it as a linear equation, would you change it to exponencial form, or can you not do that?

harsimran_hs4
 one year ago
Best ResponseYou've already chosen the best response.0you can change but that wouldn`t do any good...... a = e ^ (ln a) (basic property of log)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2ok, did you get how x=7 ? now just put x=7 in any one of f(x) or g(x)

Vague
 one year ago
Best ResponseYou've already chosen the best response.0I didn't get x=7, our teacher gave us the answers and I don't know how she got any of them. I'd really like to see someone solve the equation so I can see what you guys are talking about. ;P I tried doing it and got 7/2

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2if log A =logB then A =B \(f(x)=g(x) \implies \log_4 (x+2)=\log_4(2x5) \\ \implies x+2 = 2x5\) can you solve this linear equation ????

Vague
 one year ago
Best ResponseYou've already chosen the best response.0Yeah, it makes x=7. So to get the log4(9), you just put it into one of the equations?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2correct, put in any one of f(x) or g(x)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2and you'll get log4(9) part of your answer.
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