हिंदी

Algebra of Functions

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Topics

Estimated time: 3 minutes
  • Composition of Functions
  • Inverse functions
  • Piecewise Defined Functions
    1) Signum function
    2) Absolute value function (Modulus function)
    3) Greatest Integer Function (Step Function)
    4) Fractional part function
Maharashtra State Board: Class 12

Key Points: Algebra of Functions

Operation Result Domain
Addition (f + g)(x) = f(x) + g(x), ∀ x ∈ D₁ ∩ D₂ D₁ ∩ D₂
Subtraction (f − g)(x) = f(x) − g(x), ∀ x ∈ D₁ ∩ D₂ D₁ ∩ D₂
Multiplication (fg)(x) = f(x) · g(x), ∀ x ∈ D₁ ∩ D₂ D₁ ∩ D₂
Quotient \[\frac{f}{g}(x)=\frac{f(x)}{g(x)}\], ∀ x ∈ D₁ ∩ D₂ (g(x) ≠ 0) D₁ ∩ D₂ − {x : g(x) = 0}
Multiplication by a scalar (cf)(x) = cf(x), ∀ x ∈ D₁ D₁
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