Wb Jee
Limits Continuity And Differentiability
WB JEE 2025
MCQ+1 / -0.252025
যদি
$ f(x)= \begin{cases} x^{2}+3x+a, & x\le 1\\[4pt] bx+2, & x>1 \end{cases} \qquad (x\in\mathbb{R}) $
ফাংশনটি সর্বত্র অবকলনযোগ্য (differentiable) হয়, তবে—
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