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burhan101
 one year ago
Best ResponseYou've already chosen the best response.0\[\huge (5)(8)^{(x+2)} = 5^{7x}\]

Hero
 one year ago
Best ResponseYou've already chosen the best response.1\[5 \dot\ 8^{x+2} = 5^{7x} \\ 5 \dot\ 8^x 8^2 = \left(5{^7}\right)^x \\5 \dot\ 8^2 = \frac{\left(5{^7}\right)^x}{8^x} \\5 \dot\ 64 = \left(\frac{5^7}{8}\right)^x \\320 = \left(\frac{5^7}{8}\right)^x \] Take logs of both sides and finish simplifying

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0dw:1359086666173:dw

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0this is what i'm getting, but it is wrong

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0wait, we're we sipposed to take the log of both sides?

Hero
 one year ago
Best ResponseYou've already chosen the best response.1\[\ln(320) = \ln\left(\left(\frac{5^7}{8}\right)^x\right) \\\ln(320) = x \ln\left(\frac{5^7}{8}\right) \\\frac{\ln(320)}{\ln\left(\frac{5^7}{8}\right)} = x \\\frac{\ln(320)}{\ln5^7  \ln2^3} = x \\\frac{\ln(320)}{7\ln5  3\ln2} = x\]

Hero
 one year ago
Best ResponseYou've already chosen the best response.1Uh, ya....logs of both sides. What you do to one side, you do to the other side.

Hero
 one year ago
Best ResponseYou've already chosen the best response.1The last two lines, either form, is what you want.

Hero
 one year ago
Best ResponseYou've already chosen the best response.1By the way, don't forget that you are isolating x bro. Don't confuse the numerator and the denominator.

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0yeah i know but im getting a weird answer idk why .

Hero
 one year ago
Best ResponseYou've already chosen the best response.1You should have gotten what I got above. And if you're approximating, you should get x ≈ 0.628

Hero
 one year ago
Best ResponseYou've already chosen the best response.1You did not isolate x properly bro.

Hero
 one year ago
Best ResponseYou've already chosen the best response.1Take a look at your second to last step.

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0ohhh, i figured it. i flipped it

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0got it ! thanks man :)
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