Simple Logarithmic Question

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I am unsure of how they were able to change 8.7 to 8 and make -2.3 to 2. Whats the explanation behind this?
 

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  • #2
CRGreathouse
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5fdsQ.png


I am unsure of how they were able to change 8.7 to 8 and make -2.3 to 2. Whats the explanation behind this?
It's not that 8.7 was changed to 8, but that [tex]\lfloor8.7\rfloor[/tex] was changed to 8,since 8.7 rounded down is 8.
 
  • #3
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And [tex]\lceil -2.3 \rceil[/tex] is rounded up to -2.
 
  • #4
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Ohhhh I didnt even notice those were the ceiling and floor functions, I thought they were just brackets! Thanks!
 

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