Let a=min{x2+2x+3,x∈R}, b=limθ→01−cosθθ2 and n∑r=0ar⋅bn� – InterviewSolution

1.	Let a=min{x2+2x+3,x∈R}, b=limθ→01−cosθθ2 and n∑r=0ar⋅bn−r=f(n), then which of the following is/are correct?
Answer» Let $a = min {x^{2} + 2 x + 3, x \in R},$ $b = lim θ \to 0 \frac{1 - cos θ}{θ^{2}}$ and $n \sum r = 0 a^{r} \cdot b^{n - r} = f (n),$ then which of the following is/are correct?

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