Formulas
Every formula, extracted and explained
Orbily scans your course and gathers every formula into one clean list: the expression front and center, plus a one-line explanation of what it means and when to use it.
Formulas
Math · Calculus
Differentiation
(uv)' = u'v + uv'
Product rule: differentiate each factor in turn
(eᵘ)' = u'·eᵘ
The exponential copies itself, times u′
(ln u)' = u'/u
Chain rule on the log, valid where u > 0
Limits
lim₀ sin(x)/x = 1
Reference limit, proved by squeezing
lim₊∞ ln(x)/x = 0
Growth comparison: x beats ln(x)
What you get
All the formulas of a chapter, gathered in one place
Each formula comes with a plain-language explanation
No more digging through pages of notes before an exam
Great for maths, physics, chemistry and economics
Good to know
They are extracted from the courses you imported, so the list matches exactly what you are studying.
No. Every formula has a short explanation: what it computes and when to use it.