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## Complex Numbers Formulas

Definitions A complex number is written as a + bi where a and b are real numbers an i, called the imaginary unit, has the property that i2 = -1. The complex numbers a + bi and a – bi are called complex conjugate of each other. Formulas 1) Equality of complex numbers a + […]

## Set Identities Formulas

Definitions: Universal set: I Empty set: $$\emptyset$$ Union of sets $$A \cup B = \{x|x \in A or x \in B\}$$ Intersection of sets $$A \cap B = \{x|x \in A and x \in B\}$$ Complement $$A’ = \{ x \in l | x \in A \}$$ Difference of sets \( B […]

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