GKFix MCQ Question

What is the relationship between Eqs. (9.19) and (9.20)?

• A. Eq. (9.20) is derived from Eq. (9.19) by setting OB → ∞ and DI = f
• B. Eq. (9.20) is the inverse of Eq. (9.19)
• C. Eq. (9.19) and Eq. (9.20) are identical
• D. Eq. (9.19) is derived from Eq. (9.20) by setting f → ∞