Almen matematik Flashcards

1
Q

(fg)(x)

A

f(x)g(x)

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2
Q

Bijection

A

Elementer i y har præcis ét tilsvarende element fra x. (Injectiv + surjectiv)

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3
Q

C

A

Komplekse tal. a + bi, hvor a,b er R og i er kvrod af -1

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4
Q

Injective function

A

Elementer i y har enten ingen eller præcis ét tilsvarende fra x

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5
Q

N

A

Naturlige tal {1,2,3,…}

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6
Q

Q

A

Rationelle tal. a/b hvor a,b er Z og b != 0

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7
Q

R

A

Reelle tal. Z, Q + decimal

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8
Q

Surjectiv

A

Hvert element i y, har mindst ét tilsvarende element fra x.

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9
Q

Z

A

Heltal (integer) {…,-2,-1,0,1,2,…}

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