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Set of all real value of a such that f(x...

Set of all real value of `a` such that `f(x)=((2a-1)x^2+2(a+1)x+(2a-1))/(x^2-2x+40)` is always negative is a. `(-oo,0)` b. `(0,oo)` c. `(-oo,1/2)` d. none

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