Let \( f:(-\infty,-1] \rightarrow\left(\frac{\pi}{2}, \pi\right] \)... VIDEO
Let \( f:(-\infty,-1] \rightarrow\left(\frac{\pi}{2}, \pi\right] \) be defined as \( f(x)=\sec ^{-1}\left(-x^{2}+x+a\right) \). If \( f(x) \) is surjective,https://bit.ly/YTAI_PWAP https://www.pw.live
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