If f(t)= array ll at -1 & t so that _ 0 ^ x f(x) d x is differentiable for all x 0 is

Mathematics · JEE Advanced · NTA ExamsIntegral Calculus

If \(f(t)=\left\{\begin{array}{ll} \mathrm{at}-1 & \mathrm{t}<1 \\ \mathrm{t}^{2}+b & t \geq 1 \end{array}\right.\) then possible set of values of
so that \(\int_{0}^{x} f(x) d x\) is differentiable for all \(x \geq 0\) is
  1. \((5,1)\)
  2. \((1,3)\)
  3. \((4,2)\)
  4. none of these

Answer

(C) (4,2)

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