Author Sarahsanchez in Mathematics, 07.04.2018

Please help me understand this. Im not cheating, I don't know how to address this. If someone could only tell me how to, I could do it myself:-RRB- -2 =< d + 1/2 < 4 1/2

Answered by D3xt3R

At first time let write the inequation:now we can add ThereforeI'm sorry about my mistake, I didn't know this notation

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