2 years ago

How many points are used to define a plane? A. zero B. one C. two D. three

Mathematics

2 answers:

Ivan2 years ago

6 0

The answer will be D. three

slamgirl [31]2 years ago

5 0

Answer:

it will be D

Step-by-step explanation:

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expeople1 [14]

Let $\mathbf u\in\mathbb R^2$ , where

$\mathbf u=(u_1,u_2)$

and let $k\in\mathbb R$ be any real constant.

Given this definition of scalar multiplication, we can see right away that there is no identity element $e$ such that

$e\mathbf u=\mathbf u$

because

$e\mathbf u=e(u_1,u_2)=(eu_1,0)\neq(u_1,u_2)=\mathbf u$