mari5512
25.08.2019 •
Mathematics
The sum of a number and its reciprocal is 2.9. find all possible values of the number.
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Ответ:
x^2 + 1 = 2.9x
x^2 - 2.9x +1 = 0
(x - 0.4)(x - 2.5) = 0
x - 0.4 = 0 so x = 0.4
x - 2.5 = 0 so x = 2.5
x = 0.4 and x = 2.5
Ответ:
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