Mathematics - Additional - 0606 CIE

Functions, Domain And Range

Akopọ

Every function is a rule with two guest lists: the set of inputs it will accept, and the set of outputs it can produce. The first is the domain, the second is the range. Knowing both turns a function from a vague formula into a precisely defined object, and many of the most rewarding questions in the course hinge on getting them right.

In this lesson you will learn how to read the domain and range from a rule, why some functions need their domain restricted before they behave, and the difference between one-one and many-one functions. These ideas are the gateway to inverse and composite functions later in the syllabus.

Awọn Afojusun

  1. Understand the terms function, domain, range (image set), one-one function and many-one function.
  2. Find the domain and range of functions, including composite and inverse functions.

Akọ̀wé Ẹ̀kọ́

A function is only fully described once you say what it may eat and what it can serve. A formula such as a square root is meaningless on negative inputs, and a cost model only makes sense for positive quantities. Pinning down the domain and range keeps your reasoning honest and is the first step toward inverses, which only exist for the right kind of function.

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Oriire fun ipari ẹkọ lori Functions, Domain And Range. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.

Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.

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  1. What is the domain of g(x) = sqrt(x - 4)? A. x >= 0 B. x >= 4 C. x <= 4 D. all real x Answer: B
  2. What is the range of f(x) = x^2 for all real x? A. f(x) > 0 B. f(x) >= 0 C. all real f(x) D. f(x) <= 0 Answer: B
  3. Which value must be excluded from the domain of h(x) = 1/x? A. x = 1 B. x = -1 C. x = 0 D. none Answer: C
  4. Which function is one-one over all real numbers? A. f(x) = x^2 B. f(x) = 2x + 3 C. f(x) = x^2 - 4 D. f(x) = |x| Answer: B
  5. For f(x) = x^2 with domain 1 <= x <= 3, what is the range? A. 0 <= f(x) <= 9 B. 1 <= f(x) <= 9 C. 1 <= f(x) <= 3 D. f(x) >= 0 Answer: B

O wa lori ohun elo Green Bridge

Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.

Awọn akọsilẹ ẹkọ ni kikun pẹlu awọn aworan apejuwe
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Kọ ẹkọ laisi intanẹẹti, nigbakugba, nibikibi
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O wa lori ohun elo Green Bridge

Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.

Awọn akọsilẹ ẹkọ ni kikun pẹlu awọn aworan apejuwe
Oluranlọwọ ẹkọ ti AI ṣe agbara rẹ
Kọ ẹkọ laisi intanẹẹti, nigbakugba, nibikibi
O wa lori Android, Windows, macOS, ati Linux

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