Mathematics

Problem

Vectors

\mathbf{a}=3\mathbf{i}-4\mathbf{j}

and

\mathbf{b}=p\mathbf{i}+2\mathbf{j}

form two sides of a triangle whose area is

5

square units. The positive value of

p

is a)

4

6

1

\dfrac{7}{2}