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EC311 · Intermediate Microeconomics

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EC311 / TOPIC 01

1.1 Marginal reasoning and optimization

One idea · follow the reasoning · then practise1 / 9

01

What should we choose when the derivative solution lies outside the feasible range?

Top-down scene with coffee, a wallet, a notebook, and several curves crossing a dashed line at an orange point
VISUAL NOTE · Consumer choice Think one marginal change at a time

A shop considers one more unit. Should it compare totals or the extra revenue and cost?