Lesson Library + Practice Sets
The full 175-lesson Library and all 46 Practice Sets, marked instantly.
₱499one payment
Basic Calculus · Derivatives
Maxima and Minima with Derivatives
Peaks and valleys happen where the tangent is flat — set the derivative to zero, solve, and use the sign change of f prime to tell a maximum from a minimum.
This lesson is part of a NEXUS plan.
Log in if you already have a plan, or pick one below. You pay once with any QR Ph app (GCash, Maya, your bank) and the whole library unlocks straight away.
Plans
Pick a plan, pay once by QR Ph
The diagnostic exam stays free. Everything else is one payment, no subscription.
All-Access Pass
A seat in a UPCAT 2028 Live Class, plus the Lesson Library and every Practice Set.
₱2,500early bird until Dec 9, 2026 · ₱3,000 after