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Fundamental Theorem of Calculus (CIE A Level Maths: Pure 1)
Revision Note
Fundamental Theorem of Calculus
What is the fundamental theorem of calculus?
- The Fundamental Theorem of Calculus states that integration is the inverse process of differentiation
- This form of the Theorem relates to Indefinite Integration
- An alternative version of the Fundamental Theorem of Calculus involves Definite Integration
What is “+c” (plus c)?
- When differentiating y, constant terms ‘disappear’
- for constants y = c,
- graphs of constants are horizontal lines and so have gradient of 0
- Integrating , to get y, cannot determine the constant
- To acknowledge this constant, “+ c” is used
- c is called the constant of integration
Notation
- is the sign for integration
- If it has more than one term the function to be integrated (called the integrand) should be in brackets
- “Integrate” -– “all of (…)” -– “with respect to x”
- dx means integrate with respect to x, any other letter is treated like a number (ie like a constant)
Worked example
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