Function Notation
Akopọ
Mathematics needs a compact, unambiguous way to talk about functions, and that is what function notation provides. The single symbol f(x) packs in the name of the rule, its input, and its output, all at once. Once you are fluent in this shorthand, evaluating, inverting and combining functions becomes clean and quick.
In this lesson you will read and use the notations \(f(x)\) and \(f:x\mapsto\ldots\), evaluate a function at a value, and meet the two operations that build new functions from old: the inverse \(f^{-1}\) and the composite \(fg(x)=f(g(x))\). You will also see what \(f^2(x)\) really means, which is not what many students first guess.
Awọn Afojusun
- Recognise and use function notation, including f(x), f : x maps to, the inverse f-inverse(x), composite functions fg(x), and f squared (x) meaning f(f(x)).
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Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Function Notation. 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.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- Given f(x) = 2x + 3, what is f(5)? A. 10 B. 13 C. 16 D. 25 Answer: B
- Given f(x) = 2x + 3, what is f(-1)? A. -1 B. 1 C. 2 D. 5 Answer: B
- What does f^2(x) mean for a function f? A. [f(x)]^2 B. f(f(x)) C. 2 f(x) D. f(x) + f(x) Answer: B
- Given f(x) = 2x + 3 and g(x) = x^2, what is fg(x)? A. (2x + 3)^2 B. 2x^2 + 3 C. 4x + 9 D. 2x + 3 Answer: B
- The inverse of f(x) = 2x + 3 is: A. (x - 3)/2 B. (x + 3)/2 C. 1/(2x + 3) D. 2x - 3 Answer: A
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Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Composition of Functions
Combine functions using algebraic operations.
"College Algebra: Composition of Functions" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-algebra/pages/3-4-composition-of-functions. Access for free at https://openstax.org/books/college-algebra/pages/1-introduction
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Abala ìwé ẹ̀kọ́
Inverse Functions
Verify inverse functions.
"College Algebra: Inverse Functions" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-algebra/pages/3-7-inverse-functions. Access for free at https://openstax.org/books/college-algebra/pages/1-introduction
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Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Function Notation? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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