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If the function f(x) = {{:(3x-8",""if",x...

If the function f(x) = `{{:(3x-8",""if",xle5),(2k",if",xgt5):}` is continuous, then the value of k is :

A

`2/7`

B

`7/2`

C

`3/7`

D

`4/7`

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