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(x^-1 - 2y^-1)/(x^-1 + y^-1)...

(x^-1 - 2y^-1)/(x^-1 + y^-1) =

a. (y - 2x)/(x + y)

b. (2y - x)/(x + y)

c. (y - x)/(2x + y)

d. (y - x)/(x + 2y)

e. (2x + y)/(y - x)

f. (x + 2y)/(y - x)

g. (2x + y)/(x + y)

h. (x + 2y)/(x + y)

i. none of these

a. (y - 2x)/(x + y)

b. (2y - x)/(x + y)

c. (y - x)/(2x + y)

d. (y - x)/(x + 2y)

e. (2x + y)/(y - x)

f. (x + 2y)/(y - x)

g. (2x + y)/(x + y)

h. (x + 2y)/(x + y)

i. none of these

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