Function notation, domains and ranges
A function includes its domain. Find every algebraic and contextual input restriction, then determine outputs actually attained, checking vertices, endpoints and excluded values.
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A function includes its domain. Find every algebraic and contextual input restriction, then determine outputs actually attained, checking vertices, endpoints and excluded values.
Use factors to reveal zeros and multiplicities, expanded form to reveal coefficients, and derivative signs when stationary-point classification is required. Check reconstructed expressions against every condition.
Exponentials describe multiplicative change; logarithms recover exponents. Preserve domain restrictions, isolate the exponential component, and distinguish limiting levels from attained outputs.
Track coordinates through transformations, check both stages of a composite, and exchange domain and range when inverting. Preserve excluded inputs and distinguish matching heights from matching gradients.
Use radians consistently, derive exact magnitudes from special triangles, and use the unit circle for signs and periodicity. Quadrant information resolves square-root choices in identity calculations.
Derive signs from unit-circle symmetry, use identities within their domains, and preserve excluded and zero cases when simplifying or solving.
Use amplitude, period and phase to sketch circular functions, transform the angle domain before solving, and justify that every branch and allowed endpoint has been considered.
Build amplitude and midline from extrema, determine the true cycle interval, anchor the phase to an event, and turn threshold roots into contextual time intervals.
Derive rates by simplifying a nonzero-step difference quotient before taking its limit. Check both sides at joins and distinguish function values, slopes and stationary-point classifications.
Identify the outer operation, apply its rule, and differentiate each nested piece with its own chain factors. Preserve domains and check representative slopes before interpreting tangents or stationary points.
Use the original function for contact points and its derivative for directions. Handle vertical normals explicitly, solve for unknown contact inputs, and distinguish derivative slopes from original heights.
Classify stationary candidates with local signs, compare all feasible candidates for global extrema, and interpret motion through velocity signs rather than position alone.
Integrate to a family, apply every supplied condition to the correct function, and differentiate the completed answer as a check. Preserve domain restrictions and distinguish position from change in position.
Evaluate signed accumulation through antiderivative endpoint differences, preserve orientation, and use additivity or supplied derivative relationships before attempting unnecessary algebra.
Locate boundaries and crossings first, integrate non-negative vertical separations piece by piece, and check both the geometry and the units before reporting total area.
Recover changes through definite integrals, attach initial levels for positions or amounts, and split signed motion or piecewise rates where interpretation requires it.
Build a valid probability table, calculate weighted moments accurately, and distinguish long-run averages from individual outcomes and event probabilities.
Check the trial assumptions, define the count event precisely, and use complements and integer boundary checks to make binomial calculations complete and interpretable.
Use density areas for continuous probabilities, standardise with the correct spread, and translate tail statements carefully before cumulative or inverse-normal calculations.
Distinguish the unknown population parameter from the sample estimate, use the appropriate sampling spread, and interpret confidence as procedural coverage while checking sample quality and approximation conditions.
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Current Mathematics Methods Level 4 course version 1e; EAS Version 1.2 February 2022, linked June 2026; September 2026 updated 2025 report independently checked.
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