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OpenStudy (anonymous):
use the geometric mean to find the vaule of a12 a11=72 and a13=1/2
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OpenStudy (anonymous):
a12 = root(a11 x a13)
OpenStudy (anonymous):
is the answer 143.49?
OpenStudy (anonymous):
whats the formula for geometric mean? i only know of sequence and progression
OpenStudy (anonymous):
6
OpenStudy (anonymous):
root (72 x 1/2)
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OpenStudy (anonymous):
a12 = sqrt(a11 * a13) = sqrt(72*1/2) =sqrt(36) i.e 6 or -6
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