Question

AJUTAȚI va rog frumos​

Answer 1

Răspuns:

Explicație pas cu pas:

4)

1)

3≤x<8

C={ 3,4,5,6,7 }

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2)

A∪B={1,3,5,7,2,4,6,8 }

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3)

B∩C={6}

4)

A∩B∩C= {∅}

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5)

A/C={1}

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6)

B/C= { 2,8 }

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5)

3¹/₉= 28/9

1¹/₈=9/8

0,62=62⁽²/100⁽²=31/50

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= (28/9⁽⁹*9⁽⁹/8- 31/50):(34/10-16/10)

= (²⁵⁾28/8-⁴⁾31/50):18/10

= (700/200-124/200):18/10

= 576⁽¹⁸/200⁽¹⁰*10⁽¹⁰/18⁽¹⁸

= 32⁽⁴/20⁽⁴

=8/5

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6)

a= prima zi

b= a doua zi

c= a treia zi

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a+b+c=240

2/5*240= 480/5= 96 lei ( a cheltuit prima zi )

240-96=144 lei (au ramas)

2/3*144= 288/3= 96 lei ( a cheltuit a doua zi )

240-(96+96)= 240- 192= 48 lei ( a cheltuit a treia zi)