FBA 120 RevisionCalculus for Business Students · DLI / UNILAG
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Tonight's plan 🎯

Everything here is built from the FBA 120 course module (3 modules, 26 study sessions: differentiation, integration, vectors, matrices, sequences & series, mathematics of finance, probability, permutations & combinations), the 200-level DLI FBA 120 past-question bank (every answer re-worked — wrong keys in the document are corrected and flagged ⚠) and the FBA 120 CBT quiz (answers worked out step by step). Work top to bottom, or jump straight to the CBT if you're short on time.

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Suggested order

1. Study Guide (40–60 min)

Work through all 26 sessions — rules, worked examples and the exact business applications (MC, MR, AC, profit, elasticity, compound interest, annuities, probability) the CBT loves.

2. Flashcards (20 min)

Drill every formula and definition until your "Know it" pile is full.

3. Quiz practice (30 min)

Instant working after every answer. Filter by your weakest topic.

4. CBT Simulation (final run)

Timed, mixed, exam-style paper. Keep scrap paper and a calculator handy.

High-yield quick reference

Quick reference — full sheet under "Formula Sheet" tab
MC = dC/dx · MR = dR/dx · AC = C/x · R = p × q · Profit π = R − C
Max/min: set dy/dx = 0 → d²y/dx² < 0 maximum, > 0 minimum · Max profit where MR = MC
Elasticity e = (p/q)·(dq/dp) · |e| > 1 elastic · |e| < 1 inelastic · |e| = 1 unit
∫xⁿdx = xⁿ⁺¹/(n+1) + c · ∫dx/x = ln|x| + c · ∫eᵃˣdx = eᵃˣ/a + c · TC = ∫MC dx + FC
CA = P(1 + i)ⁿ · PV = S/(1 + r)ⁿ · APR = (1 + i/m)ᵐ − 1 · Perpetuity PV = A/r
AP: Tₙ = a + (n − 1)d, Sₙ = n/2[2a + (n − 1)d] · GP: Tₙ = arⁿ⁻¹, S∞ = a/(1 − r)
P(A ∪ B) = P(A) + P(B) − P(A ∩ B) · P(A/B) = P(A ∩ B)/P(B) · ⁿPᵣ = n!/(n − r)! · ⁿCᵣ = n!/[r!(n − r)!]

Study Guide

Tap a module, then a session, to expand. Formulas are boxed; the module's own worked examples are highlighted.

Flashcards

Tap to flip
Tap to flip back

Practice Quiz

CBT Exam Simulation

Past Questions

The 200-level DLI FBA 120 past-question bank — differentiation applications, probability, integration, sequences & series, permutations & combinations and commercial maths — with full working. The original document's answer key had many errors; every question was re-solved, and where the key or options were wrong you'll see ⚠ Corrected with the reason. Tap a question to see the answer.

FBA 120 CBT Quiz

The FBA 120 quiz document (Moodle-style "Select one:" questions), repeats removed. The document came with no answers — each one is worked out below. Tap a question to reveal it.

Formula Sheet

Every formula, rule and definition from the module that the CBT tests directly.