Question

two vectors are given as A=3i+9j-6k and B=8i-4j+8k. find |A+B|

Answer 1

|A+B| = (3i+9j-6k)+(8i-4j+8k)

= 11i+5j+2k

Answer 2

Answer:

Concept :

A quantity with both magnitude and direction is called a vector. Vectors can be used for some mathematical operations like addition and multiplication. There are two methods for multiplying vectors dot product and cross product.

Explanation:

Given :

A=3i+9j-6k

B=8i-4j+8k

To find :

|A+B|

Solution :

A+B = 11j+5j+2k

|A+B| = $\sqrt{11^{2} }$ + $5^{2}$ +$2^{2}$

=√121+25+4

=√150

=12.247

#SPJ2