2. Suppose u, U2,, Un are independent vectors in R". Let k 0 be a real number. Show that then, the vectors below are also independent: v = ku - ku2, v = k u k uz, V3 = ku3 - ku4, v = k+ui ku+1, i+1, Vi Un-1 = kn Un-1 kn+1 un Un = -kn- Ung