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16 votes
16 votes
Find f(-5) if f(x)=[x+1]

User Isolated Ostrich
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1 Answer

19 votes
19 votes

Answer: -5

Explanation:

square brackets mean that you need to select an integer part from the number that does not exceed the original number, that is, if we have a number, that is, if [5,1]=5 or [-5,1]=-6 ; curly brackets highlight the fractional part {}
\displaystyle\ \Large \ \boldsymbol{Rules: } \\\\\\\boldsymbol{ if \ x >0 => [x]=x-\{x\}} \\\\\\\boldsymbol{if \ x<0 => [x]=x-1+\{x\}} \\\\\\then \ \ f(-5)=[-5+1]= [-4]=-4-1+0=\boxed{-5}

User Kuti Gbolahan
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