175s Classroom → 50s Sub-90 Target27-Q Mathematics 2 Mock
Archetype Sub-90 Dry-Wipe Invariant (Stationary Point Classification, Monotonic Cubics & Constrained 2D/3D Optimisation): A cubic ax³+bx²+cx+d (a>0) is increasing for all x iff its derivative 3ax²+2bx+c >= 0 everywhere, which reduces to discriminant (2b)² - 4(3a)(c) <= 0 => b² <= 3ac.
sub90 ESATARCH-MM-09: Stationary Point Classification, Monotonic Cubics & Constrained 2D/3D OptimisationMathematics 2
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SUB-90 ZONE (<50S)
0.0s50s Sub-9090s ESAT Budget150s Classroom
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Mathematics 2•ARCH-MM-09•Standard 5-Option
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