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Assume that underset(thetararr-1)(lim)f(...

Assume that `underset(thetararr-1)(lim)f(theta)` exists and `(theta^(2)+theta-2)/(theta+3)le(f(theta))/(theta^(2))le(theta^(2)+2theta-1)/(theta+3)` holds for certain interval containing the point `theta=-1 " then "underset(thetararr-1)(lim)f(theta)`

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