Question

a and b are two vectors and |a| = 3. Find the value of |a+b| when:

(i) b = 2a
(ii) b = -3a
(iii) b is perpendicular to a and |b| = 4​

Answer 1

Step-by-step explanation:

hope you understand that

Answer 2

Answer:

(iii) b is perpendicular to a and lbl = 4 is the answer for this question