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Questions  

 The minimum value of f(x)=|3x|+|2+x|+|5x| is 

a
0
b
7
c
8
d
10

detailed solution

Correct option is B

f can be written as f(x)=3−x−(2+x)+5−x if x≤−2 3−x+2+x+5−x if −2

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