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Calculus formulas

Core differentiation rules (power, product, quotient, chain) and basic integration, including definite integrals.

These pages explain formulas for reference. They don't mean Mathover can solve every problem that uses them — interactive calculations are limited to the linked tools.

Power rule (derivatives)

d/dx (xⁿ) = n·xⁿ⁻¹

Bring the power down as a multiplier and reduce the power by one. Constant multiples carry through.

Symbols

n
any real constant power

When it applies

Any constant n, where xⁿ is defined. The derivative of a constant is 0.

Worked example

Differentiate 4x³.

  1. 1.d/dx (x³) = 3x²
  2. 2.4 × 3x² = 12x²

Answer: 12x²

Try it in the Derivative Calculator tool →

Product rule

d/dx (u·v) = u′v + uv′

Differentiate one factor at a time, keeping the other unchanged, and add.

Symbols

u, v
functions of x
u′, v′
their derivatives

When it applies

Wherever both u and v are differentiable.

Worked example

Differentiate x²·sin x.

  1. 1.u = x², u′ = 2x
  2. 2.v = sin x, v′ = cos x
  3. 3.u′v + uv′ = 2x·sin x + x²·cos x

Answer: 2x sin x + x² cos x

Try it in the Derivative Calculator tool →

Quotient rule

d/dx (u ÷ v) = (u′v − uv′) ÷ v²

For a fraction of two functions. The order on top matters: bottom times derivative of top, minus top times derivative of bottom.

Symbols

u
numerator
v
denominator

When it applies

Wherever v ≠ 0 and both are differentiable.

Worked example

Differentiate (x + 1) ÷ (x − 1).

  1. 1.u = x + 1, u′ = 1; v = x − 1, v′ = 1
  2. 2.(1·(x − 1) − (x + 1)·1) ÷ (x − 1)²
  3. 3.= (x − 1 − x − 1) ÷ (x − 1)² = −2 ÷ (x − 1)²

Answer: −2/(x − 1)², for x ≠ 1

Try it in the Derivative Calculator tool →

Chain rule

d/dx f(g(x)) = f′(g(x)) · g′(x)

Differentiate the outer function (leaving the inside alone), then multiply by the derivative of the inside.

Symbols

f
outer function
g
inner function

When it applies

Compositions where both functions are differentiable.

Worked example

Differentiate (3x + 1)⁴.

  1. 1.Outer: u⁴ → 4u³, with u = 3x + 1
  2. 2.Inner derivative: 3
  3. 3.4(3x + 1)³ × 3 = 12(3x + 1)³

Answer: 12(3x + 1)³

Try it in the Derivative Calculator tool →

Standard derivatives

(sin x)′ = cos x, (cos x)′ = −sin x, (eˣ)′ = eˣ, (ln x)′ = 1/x

Derivatives of the basic functions, used as building blocks with the other rules.

Symbols

x
the variable, in radians for trig functions

When it applies

sin and cos results assume x is in radians. ln x needs x > 0.

Worked example

Differentiate 3 sin x + eˣ − ln x.

  1. 1.3 × cos x = 3 cos x
  2. 2.eˣ stays eˣ
  3. 3.ln x → 1/x, so −ln x → −1/x

Answer: 3 cos x + eˣ − 1/x, for x > 0

Try it in the Derivative Calculator tool →

Power rule (integrals)

∫ xⁿ dx = xⁿ⁺¹ ÷ (n + 1) + C

Raise the power by one and divide by the new power. Add a constant C for an indefinite integral.

Symbols

n
constant power
C
constant of integration

When it applies

n ≠ −1. For n = −1, ∫ 1/x dx = ln|x| + C.

Worked example

Find ∫ 6x² dx.

  1. 1.∫ x² dx = x³ ÷ 3
  2. 2.6 × x³/3 = 2x³
  3. 3.Add the constant

Answer: 2x³ + C

Try it in the Integral Calculator tool →

Integral of 1/x

∫ 1/x dx = ln|x| + C

The case the power rule can't handle (it would divide by zero). The absolute value covers negative x.

Symbols

C
constant of integration

When it applies

x ≠ 0. A definite integral can't cross x = 0.

Worked example

Find ∫ 3/x dx.

  1. 1.3/x = 3 × (1/x)
  2. 2.3 × ln|x|

Answer: 3 ln|x| + C

Try it in the Integral Calculator tool →

Definite integral

∫ₐᵇ f(x) dx = F(b) − F(a)

Find an antiderivative F, then subtract its value at the lower limit from its value at the upper limit. The C cancels.

Symbols

F
any antiderivative of f
a, b
lower and upper limits

When it applies

f must be continuous on [a, b].

Worked example

Evaluate ∫₀² 3x² dx.

  1. 1.F(x) = x³
  2. 2.F(2) = 8, F(0) = 0
  3. 3.8 − 0 = 8

Answer: 8

Try it in the Integral Calculator tool →