aleahspitzley30661 aleahspitzley30661

01-02-2018
Mathematics

contestada

For what values of a are v = a i − j + k and w = a i + a j − 3 k perpendicular? give exact values.

Respuesta :

sqdancefan sqdancefan

08-02-2018

The vectors are perpendicular when their dot product is zero. That is
.. a^2 -a -3 = 0
.. (a -1/2)^2 -13/4 = 0
.. a = (1 ±√13)/2

Answer Link

Otras preguntas

What is a number with one or more digits to the right of the decimal point called? P.S I’m only fifth grade..... thx for the help :)

1] in a survey , one out of ten people named blue as there favorite color. tree out of five named red. if 1,00 people were included in the survey .how many name

A farmer is able to prepare 1/2 are of soil in 3 days. How long will it take him to prepare 2 1/4 acres of soil?

A swimming pool is being filled and begins ejth 400 gallons of water in it. After 8 minutes, the pool contains 816 gallons of water. assuming that water is bein

What reason did perry give for his visit to Japan

What would be the answer

More massive objects have a large gravitational force or weight. Why do heavier objects accelerate to the ground at the same rate as lighter ones? A) Small

get free coins ok because im nice

Express 120 as a product of two numbers, one of which is less than the other

what is[tex]42 {?}^{2} [/tex]