1. Яка з наведених формул
правильна?
x +x_
2
A) 2
Б)
x+x
2
X1-X2
2

правильна?
A) AB
=
У1-Уг
2
B)
2
2. Яка з наведених формул
y, +y.
1
2
2
=
__y+y
2
V(xz - x,)2 + &z - y,)?
2
Б) AB :
√(xo - x, )2 + (% - y.,)?
B) AB =
=
2
√(xz - ×, ) ² — (, — У,)?
2
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