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

Collecting data from a sample that does not represent the population is called

PLEASE HELP ME!!!!!!!!!! 57-4t >(their is an egual sign under the less then sign)13 A. t<=-15 B. t<=15 C. t<=11 D. t=>-11

Ben eats approximately 2400 calories per day. His wife Sarah eats 5/8 as much. How many calories does Sarah eat per day?

Which of the following statements best describes Islam's spread from the 7th century through the 17th century?

If r = x, y, z and r0 = x0, y0, z0 , describe the set of all points (x, y, z) such that |r − r0| = 5.

From a rectangular piece of cardboard having dimensions a × b, where a = 20 inches and b = 70 inches, an open box is to be made by cutting out an identical squa

A kite flying in the air has a 12 ft line attached to it. Its line is pulled taut and casts an 11 ft shadow. Find the height of the kite. If necessary, round y

Which part of the ignition system amplifies the electrical voltage?

What do psychologists use to identify ethical and unethical behavior?

He will find my __gem