MCQ
વિધેય y = 6 - 9x - x2 એ _________ અંતરાલમાં ચુસ્ત રીતે વધે છે.
- ✓$\left(-\infty,-\frac{9}{2}\right)$
- B$\left(-\infty, \frac{9}{2}\right)$
- C$(-\infty, 0)$
- D$\left(0,-\frac{9}{2}\right)$
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