If \( \int \frac{d x}{x^{2}+a x+1}=f(g(x))+c \), then P W (1) \( f(...

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If \( \int \frac{d x}{x^{2}+a x+1}=f(g(x))+c \), then
P
W
(1) \( f(x) \) is inverse trigonometric function for \( |a|2 \)
(2) \( f(x) \) is logarithmic function for \( |a|2 \)
(3) \( g(x) \) is quadratic function for \( |a|2 \)
(4) \( g(x) \) is rational function for \( |a|2 \)
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