kataldaine
10.09.2021 •
Mathematics
What is 1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1x1
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Ответ:
-x^2
Step-by-step explanation:
Ответ:
1
Step-by-step explanation: because a number multiplied buy it self stays the same.
hope this helps <3
Ответ:
solution:
\sum ei =0
that is
\sum (yi-yiˆ)=0
means,
\sumyi = \sum yiˆ
yi = \alpha +\beta xi+ei
yiˆ=\alphaˆ+\betaˆxi
so,
\sumei=0
hence proved