Calculus Volume 1

Chapter 5 | Integration

617

KEY EQUATIONS

• Properties of Sigma Notation ∑ i =1 n c = nc ∑ i =1 n ca i = c ∑ i =1 n a i ∑ i =1 n ⎛ ⎝ a i + b i ⎞ ⎠ = ∑ i =1 n a i + ∑ i =1 n b i ∑ i =1 n ⎛ ⎝ a i − b i ⎞ ⎠ = ∑ i =1 n a i − ∑ i =1 n b i ∑ i =1 n a i = ∑ i =1 m a i + ∑ i = m +1 n a i • Sums and Powers of Integers ∑ i =1 n i =1+2+⋯+ n = n ( n +1) 2 ∑ i =1 n

i 2 =1 2 +2 2 +⋯+ n 2 = n ( n +1)(2 n +1) 6 ∑ i =0 n i 3 =1 3 +2 3 +⋯+ n 3 = n 2 ( n +1) 2 4 • Left-Endpoint Approximation A ≈ L n = f ( x 0 )Δ x + f ( x 1 )Δ x +⋯+ f ( x n −1 )Δ x = ∑ i =1 n

f ( x i −1 )Δ x

• Right-Endpoint Approximation A ≈ R n = f ( x 1 )Δ x + f ( x 2 )Δ x +⋯+ f ( x n )Δ x = ∑ i =1 n

f ( x i )Δ x

• Definite Integral ∫ a b f ( x ) dx = lim n

→∞ ∑ i =1 n

f ⎛

⎞ ⎠ Δ x

⎝ x i *

• Properties of the Definite Integral ∫ a a f ( x ) dx =0 ∫ b a f ( x ) dx =− ∫ a b f ( x ) dx ∫ a b ⎡ ⎣ f ( x )+ g ( x ) ⎤ ⎦ dx = ∫ a b f ( x ) dx + ∫ a b

g ( x ) dx

⌠ ⌡ a b ∫ a ∫ a

⌡ a b

⎦ dx = ⌠

b

f ( x ) dx − ∫

⎡ ⎣ f ( x )− g ( x ) ⎤

g ( x ) dx

a

b cf ( x ) dx = c ∫ a b

f ( x ) for constant c

b

c

f ( x ) dx + ∫ c b

f ( x ) dx = ∫

f ( x ) dx

a

• Mean Value Theorem for Integrals

Made with FlippingBook - professional solution for displaying marketing and sales documents online