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Mathematics 50 Online
OpenStudy (anonymous):

Solve 8^x – 2 = 3

sam (.sam.):

add 2 to both sides

OpenStudy (anonymous):

8^x – 2 = 3 +2 8^x = 5 ln both sides ln 8^x = ln 5 Log properties, take the x outside x ln 8 = ln 5 Divide by ln 8 x = ln 5/ln 8 x approx = 0.773976032

OpenStudy (anonymous):

really? cuz the choices are: x ≈ 2.74 x ≈ 0.26 x ≈ 2.52 x ≈ 0.40

OpenStudy (anonymous):

8 to the 0.773976032 = 5 5 - 2 = 3

OpenStudy (anonymous):

If the problem is instead 8^(x - 2) = 3, then it's the same process... 8^(x - 2) = 3 ln both sides and take the exponent out (x - 2) ln 8 = ln 3 Divide by ln 8 (x - 2) = ln 3/ln 8 Eval and add 2 x approx = 0.528320834 + 2 = 2.528320834 Next time write your problems unambiguously, please.

OpenStudy (anonymous):

thank you for your help. i'm sorry i wrote the question incorrectly :)

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