MCQ
यदि $f(x)=\left\{\begin{array}{ll}2 x+b, & x<\alpha \\ x+d, & x \geq \alpha\end{array}\right.$ इस प्रकार है कि $\lim _{x \rightarrow \alpha} f(x)=l$, तो $l$ बराबर है-
- ✓$2 d-b$
- B$2 b-d$
- C$2 d+b$
- D$b-2 d$
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