Question

Find the dot product v=3i-5j and w=7i+j

Answer 1

ok. i m trying

Answer 2

\[v.w=(3i-5j).(7i+j)=3 \times 7 (i.i)+3(i.j)-5 \times 7 (j.i)-5(j.j)\]

Answer 3

\[21 \times 1 +3 \times 0 -35 \times 0 -5 \times 1=21-5=16\]

Answer 4

feel free to ask any question

Answer 5

i will b happy to give answer

Answer 6

thanks:)