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For what value of k is the following f...

For what value of `k` is the following function continuous at `x=2` ? `f(x)={2x+1\ \ \ ;\ \ \ if\ x<2 `
`\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \k\ \ \ ;\ \ \ x=2`
` \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3x-1\ \ \ ;\ \ \ x >2`

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