19-02-2015
Mathematics

contestada

the sum of half a number and its reciprocal is the same as 51 divided by the number. find the number.

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19-02-2015

x/2 + 1/x = 51/x

(x^2)/2 +1=51/x

x^2 + 2= 102

x^2=100

x= sqrt100 = +/-10

The number is 10 or -10

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