Question

13. If A = 3 i + 2 j and B = i - 2 j + 3 k, then find the
magnitudes of A + B and A - B.
Ans plzzz
wid method​

Answer 1

Answer:

|A+B| = 5

as well as

|A- B| = root of 29

Explanation:

A+B=

(3+1) icap + [2+(-2)] jcap×(0 +3)kcap

|A+B| = root of ( 4^2 +0^2 +3^2)

= root of (16 +0+9)

= root of 25 = 5