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Given a=(2,-1,3), b=(-1,4,-2), c=(7,5, in), if a, b, c are coplanar, then why is the real number in 65/7? Given a=(2,-1,3), b=(-1,4,-2), c=(7,5), if a, b, c are coplanar, then the real number is 65/7.
Since known,
Determinant of 3 vectors =7λ-65=0
So λ=65/7.
Given two vectors a=(3,4), b=(2,-1), and (a+xb)⊥(a-b), then the real number x is equal to ()
A+xb=(3+2x,4-x) a-b=(1,5)
(A+xb)⊥(a-b),
(A+xb)*(a-b)
=(3+2X,4-x)(1,5)
=3+2X+20-5x
=23-3 X =0
X =23/3
The coordinates of a vector parallel to vector a=(1,-3,2) are ()
Well, you know, the answer to this question is, there are a lot of questions going on upstairs, and you & amp; apos; re asking about any one of these vectors, and it & amp; apos; s as simple as parallel, and it & amp; apos; s as simple as how many times as many of the originalvectors are parallel to the originalvectors, and that & amp; apos; s equivalent to translation. One of the answers. Just write one.
The answer to this question is that many of the questions in question are that any one of the vectors can be parallel as long as they are parallel. How many times as many of the original vectors are parallel to the original vectors? 4) It's one of the answers. Just write one
Well, you know, the answer to this question is, there are a lot of questions that are going on upstairs, and you & amp; apos; re asking about any one of these vectors, and it & amp; apos; s going to be parallel, and it & amp; apos; s going to be very simple. One of the answers. Just write one.
| A |=3 b =(1,2) and a and b parallel (parallel in vector) find a coordinate
Let a=(x, y), a be parallel to b, and get 2x=y.|a|=3, and get x^2+y^2=9.
A The unit vectors are equal in length B If the two unit vectors are parallel, the module of the C vector is a positive real number The D zero vector is non-directional and the above correct is: A The unit vectors are equal in length B If the two unit vectors are parallel, then the module of the two unit vectors is a positive real number The D zero vector is non-directional and the above correct is:
The lengths of the A unit vectors are all 1, so they are all equal,
B If two unit vectors are parallel, the directions may be opposite, and the moduli of the other two vectors may not be equal.
If the module of C vector is not 0, it is a positive real number. If the module of C vector is 0, it is not a positive real number.
D zero vector is arbitrary, not directionless
A Correct
For the vector a, b, c and the real number λ, the following propositions are true: A, if a is multiplied by b=0, then a=0 or b=0 B, if λa=0, then λ=0 or a=0 C, if a is multiplied by a=b, then a=b, or a=-b D, if a is multiplied by b=a is multiplied by c, then b=c For vector a, b, c, and real number λ, the following questions are true: A, if A is multiplied by B=0, then A=0 or B=0 B, if λa=0, then λ=0 or a=0 C, if A times A=B times B, then A=B, or A=B D, if A multiplied by B = A multiplied by C, then B = C
B
C is wrong, a times a=b times b can only be deduced that the length of a and b is equal, and the direction can be different
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