Question

Calculați media aritmetica

Answer 1

Răspuns

Explicație pas cu pas:

Answer 2

Răspuns

Explicație pas cu pas:

a )   Ma = ( 2√3 + 5√2 + √2 - 2√3 ) : 2 = 6√2 / 2 = 3√2

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b)    Ma = ( 3√5 + √6 + 5√6 - √5 ) : 2 =  √5 + 3√6

=  ( 2√5 + 6√6 ) : 2 =

=  2 ( √5 + 3√6) : 2 =

= √5 + 3√6

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c) [  ( 3√2 + √3 + 1 ) + ( √2 + 5√3 - 1 ) ] : 2 =  2√2 + 3√3

= ( 4√2 + 6√3 ) : 2 =

= 2 ×( 2√2 + 3√3) : 2 =

= 2√2 + 3√3

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d)   ( √7 + 2√3 + 4√3 - √7 ) : 2 = 6√3 / 2 = 3√3 → media aritmetica

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e)  ( 2 - 3√2 + 4 + 5√2 ) : 2 = ( 6 + 2√2 ) : 2 = 2 × ( 3 + √2) : 2 = 3 + √2

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f)   ( √2 + 3√3 + √3 - √2 + √3 ) : 2 = 5√3 / 2 = 2,5√3

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g) l  √2 - √3 l = √3 - √2;  √3 >√2

Ma = ( √3 - √2 - 3√2 + √2) : 2 = ( √3 - 3√2) / 2

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h) l √11 - √13 l = √13 - √11

[ ( √13 - √11 + 4√13 ) + √11 ] : 2 = 5√13 / 2 = 2,5√13