Mathematics
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OpenStudy (anonymous):
Help!!!
Which value for x makes the open sentence true?
9 • 8 – 2x + x2 ≥ x3 + x2
A.7
B.6
C.5
D.4
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OpenStudy (anonymous):
72 - 2x + 2x ≥ x^3 + x^2
?
OpenStudy (anonymous):
9 • 8 – 2x + x2 ≥ x3 + x2
OpenStudy (anonymous):
ok,i see :D
but is it 3x or x^3?
OpenStudy (anonymous):
x3
OpenStudy (anonymous):
wait
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OpenStudy (anonymous):
so it's not x^3?
OpenStudy (anonymous):
2x + x(to the 2 power) ≥ x(to the 3 power ) + x( to the 2 power )
OpenStudy (anonymous):
so is this true?
2x + x^2 ≥ x^3 + x^2
OpenStudy (anonymous):
yeah
OpenStudy (anonymous):
sorry about that
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OpenStudy (anonymous):
we have x^2 in both sides so we can cross out it :)
2x ≥ x^3
OpenStudy (anonymous):
do you have MC?
OpenStudy (anonymous):
no
OpenStudy (anonymous):
you know only 0 and 1 is correct :)
OpenStudy (anonymous):
2x0 ≥ 0^3
2x1 ≥ 1^3
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OpenStudy (anonymous):
and all the negative numbers are true too,however -1 is just false:
-1x2 , -1^3
OpenStudy (anonymous):
so this is the answer:
\[answers = 1,0,-2,-3,... \]
OpenStudy (anonymous):
ok?
OpenStudy (anonymous):
?? thats not one of the answers on my page
OpenStudy (anonymous):
what is MC?
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OpenStudy (anonymous):
what answers do you have?
OpenStudy (anonymous):
A.7
B.6
C.5
D.4
OpenStudy (anonymous):
but this question doesn't have a single answers and those answers are false!
OpenStudy (anonymous):
um ok then
OpenStudy (anonymous):
its on a test for school?!
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OpenStudy (anonymous):
but i'm sure those answers are false.