Time remaining:
how to solve x to a fraction of a power plus or minus x to another fraction = 20

Algebra
Tutor: None Selected Time limit: 1 Day

x to 1/2 power plus x to 1/4 power = 20

Mar 24th, 2015

x^0.5+x^0.25=20

(x^0.5)+(x^0.5)^0.5=20

let x^0.5=y

y+y^0.5=20

log y +0.5 log y=log20

1.5logy=log 20

log y=1.30/1.5=0.8667

y=7.36

x^0.5=7.36

x=log 7.36/0.5=1.733


Mar 23rd, 2015

Oops, is this a logrithm??  I have forgotten that.  And, I do not know where to find it.

Mar 23rd, 2015

Can it not be solved just algebraically??? Without using logarithms??

Mar 23rd, 2015

NO YOU CANT SOLVE WITHOUT LOGS

Mar 23rd, 2015

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Mar 24th, 2015
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Mar 24th, 2015
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