Consider 2sin t = \(\frac{1-2x+5x^2}{3x^2-2x-1}\), t ∈ \(\left[\frac{-\pi}{2},\frac{\pi}{2}\right]\). The range of values of t is found to be \(\left[\frac{-\pi}{2},a\right] \bigcup \left[b,\frac{\pi}{2}\right] \). Find the value of 3a + b.
1
0
2
1
3
2
4
3