Question

Show that ∆. ∇ = ∆ − ∇

Answer 1

Answer:

to prove (i) ∆.∇= ∆ − ∇

Consider, ∆.∇= ( 1 – E-1) ( E – 1)

= E – 1 – 1 + E-¹ = E – 1 – (1 – E-¹) = ∆ – ∇