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Let f(x) =lambda+ mu |x| + v |x|^(2) whe...

Let f(x) `=lambda+ mu |x| + v |x|^(2)` where `lambda, u ,v ` are real constants . Then f(0) exists if

A

`mu =0`

B

v=0

C

` lambda=0`

D

`mu =v `

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A
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