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    Mathematics A-Level

    overestimate and underestimate

    What overestimate and underestimate means in Mathematics A-Level, as defined for WJEC.

    Definition of overestimate and underestimate

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    Reference: WJEC

    Where the curve is convex the straight chords lie above the curve, so the rule overestimates; where concave the chords lie below, so it underestimates.
    WJEC · Numerical Methods (A2 Unit 3: Pure Mathematics B)

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