reganjones89
12.12.2020 •
Mathematics
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Ответ:
j(-1) = -(-1) - 4
= 1 - 4
= -3
Ответ:
Take away 1 from each, representing the same book they all read.
7 - 1 = 6 , 6 - 1 = 5 , 5 - 1 = 4
Add the three together.
6 + 5 + 4 = 15
Add that one book everyone read.
15 + 1 = 16 different books.
Hope I helped you out.