Q89·Section II (Mathematics)·89 of 190Testing the standard finite-difference operator identitiesWhich of the following is not correct? OptionsAE=1+ΔE=1+\DeltaE=1+ΔBΔ=∇(1−∇)−1\Delta=\nabla(1-\nabla)^{-1}Δ=∇(1−∇)−1C∇=E−1Δ\nabla=E^{-1}\Delta∇=E−1ΔD1+Δ=(E+1)∇−11+\Delta=(E+1)\nabla^{-1}1+Δ=(E+1)∇−1Pick an option to check your answer.Show answerShow solution Report a problem with this question← Q88All questionsQ90 →Keyboard: A–D answer · S solution · ←/→ previous/next