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OpenStudy (anonymous):
OpenStudy (anonymous):
@alias
OpenStudy (anonymous):
@Euler271
OpenStudy (anonymous):
raise each side to the fifth power. That should get rid of the exponent. Then solve the usual way to find x
OpenStudy (anonymous):
(make both sides)^5
you have
-2x + 6 = -8 + 10x
solve for x.
now realize that:\[x^{1/5} = \sqrt[5]{x}\]
extraneous solutions would be those that make either bracket = 0 since you can't have a negative root in "real numbers"
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OpenStudy (anonymous):
wow i just read what i wrote..
OpenStudy (anonymous):
the last sentence in completely wrong.
it should say: extraneous solutions would be those that make the bracket < 0 on either side. for the same reason.
not = 0 though. that's fine.
OpenStudy (anonymous):
C :s @alias
OpenStudy (anonymous):
@Euler271
OpenStudy (anonymous):
amswer is not C...
So after you raise each side by 5
-2x + 6 = -8 + 10x
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OpenStudy (anonymous):
x should be 14/12, then simplify it to get your answer :)
OpenStudy (anonymous):
B :)
OpenStudy (anonymous):
thank u !
OpenStudy (anonymous):
it's A
OpenStudy (anonymous):
Check you math... 14/12 when simplified has to be larger than 1, and B is less than 1 so it's not right.
Always check your answer and use common sense :P