This ultimate formula sheet provides a comprehensive overview of essential concepts, properties, and applications of quadratic functions. It is designed to assist high school students in mastering the fundamentals of quadratic equations while also serving as a valuable resource for university-level...
1. Functions
• A function f is a relation that assigns to each element x in a set A exactly one element
y in a set B. This is denoted as f : A → B.
• Domain: The set of all possible input values (x-values).
• Range: The set of all possible output values (y-values).
• Vertical Line Test: If a vertical line intersects the graph of the relation at more than one
point, it is not a function.
2. Quadratic Functions
Standard Form
f (x) = ax2 + bx + c
Vertex Form
f (x) = a(x − h)2 + k (where (h, k) is the vertex)
Factored Form
f (x) = a(x − r1 )(x − r2 ) (where r1 and r2 are the roots)
Vertex
b
h=− , k = f (h)
2a
Axis of Symmetry
x=h
Minimum/Maximum Value
- If a > 0: Minimum value at k. - If a < 0: Maximum value at k.
Quadratic Formula
To find the roots of ax2 + bx + c = 0:
√
−b ± b2 − 4ac
x=
2a
1
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller kyuju. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.99. You're not tied to anything after your purchase.