1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
garri49 [273]
3 years ago
13

IfA = i +3j -2K and B=4i-2j+4kFind (2A+B).(A-2B)​

Mathematics
1 answer:
Marizza181 [45]3 years ago
8 0

GIVEN :

a = 1/√10 ( 3i + k) and

b = 1/7 ( 2i + 3j - 6k)

TO FIND :

( 2a- b) . [ ( a x b ) x ( a + 2b)]

SOLUTION :

◆Going with the equation given,

( 2a - b) . [ ( a x b ) x ( a + 2b)]

= (2a - b) [( a×b×a) + 2(a×b)×b]

◆BAC - CAB RULE,

A×B×C = B( A.B ) - C(A.B )

= (2a- b ) [ (b (a.a ) - a (a.b ) + 2b ( a.b) -2b (a.b]

Solving further

= (2a - b )(b - 2a)

= -4a.a -b.b

=-5.

Answer:

( 2 - b) . [ ( a x b ) x ( a + 2b)] = -5

Hoped I helped

You might be interested in
What value of 3x makes the equation true?<br> 5x+3x=5x+15/2
slamgirl [31]

Answer:

2.5

Step-by-step explanation:

when you 5x automatically cancels, and 7.5 / 3 is 2.5

7 0
2 years ago
2 Charlie makes $34 an hour and will get a 20% raise starting next week. Choose True or False
Alex_Xolod [135]

Answer:

Step-by-step explanation:

1 False

2 True

3 False

4 false

lol that was ezy

8 0
2 years ago
Read 2 more answers
Which numbers are a distance of 3 units from 12 on a number line? Solect each correct answer// a. 3 b. 9 c. 15 d. 0 e. -9 f. -15
Vesnalui [34]

Answer:

The 3 units from 12 on a number line is 4units

3 0
3 years ago
Read 2 more answers
Can you help with a please on 46
valentina_108 [34]
3/5
Thats if u devide 9 by 3 and 15 by 5
5 0
3 years ago
Read 2 more answers
This will take the smartest brainly player<br> Give explanation
ratelena [41]

Answer:

n^6 is the answer

n^{6} * n^{\frac{1}{4} } = n^{\frac{25}{4} }

\frac{1}{\sqrt[4]{n} } * n^{\frac{25}{4} } = \frac{n^{\frac{25}{4} } }{n^{\frac{1}{4} } }  = n^{\frac{25}{4} } - n^{\frac{1}{4} } = n^{6}

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • What is the value of x in the equation 5(2x - 7) = 15x -10
    5·1 answer
  • Y squared + 5y - 84 equals what
    9·1 answer
  • Kiki painted 15 of her bookshelf on Monday and 56 of her bookshelf on Tuesday. She says she has painted ​611​ of her bookshelf.W
    6·1 answer
  • Help and explain this to me
    8·1 answer
  • Help me plz I need help
    14·2 answers
  • For problem (1) and (2), use Gauss-Jordan reduction to transform the augmented matrix of each system to RREF. Use it to discuss
    13·1 answer
  • which number is equivalent to 3 to the 4th power over 3 to the 2nd power (its a fraction thats why i said over)
    12·1 answer
  • What is the domain of f(x)=5x-7
    9·2 answers
  • Cuantos lados tiene un cuadrilátero y cuales son?
    13·1 answer
  • I would like to know how to solve these sort of questions
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!