Korean CSAT Mathematics cheat sheet
Korean CSAT Mathematics · Keep the key ideas within reach.
Functions, algebra and sequences
Preserve domain restrictions.
Apply inner functions first.
Distinguish terms from sums.
Check roots in the original model.
Limits, derivatives and integration
A stationary point is only a candidate extremum.
Check closed-interval endpoints.
Signed integral and geometric area can differ.
Use an initial condition to determine the constant.
Coordinate geometry, trigonometry and vectors
Label the geometric conditions.
Radius and radius squared differ.
Check all angles in the specified interval.
Use nonzero-vector conditions when interpreting a dot product.
Counting, probability and statistical summaries
Distinguish order-sensitive counting.
Update probabilities after sampling without replacement.
Use the conditional sample space.
Weight group means by group sizes.