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Questions  >>  CBSE XII  >>  Math  >>  Model Papers
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Consider \( f : R_+ \rightarrow [ -5, \infty ] \) given by \( f(x) = 9x^2 + 6x - 5\). Show that f is invertible with \( f^{-1} (y) = \bigg[\large \frac{\sqrt {y+6} - 1}{3} \bigg] \)

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