Question

Urgent dau coroana!!!!!!!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

media aritmetica a numerelor a si b = ma(a,b)

a) a = 2 ; b = 18 => ma (2 ; 18) = (2+18)/2 = 20/2 = 10

b) a = 7,25 ; b = 22,75 => ma(a,b) = (7,25+22,75)/2 = 30/2 = 15

c) a = 5,5 ; b = 1,8(3) = (183-18)/90 = 11/6 =>

ma(a,b) =(55/10 + 11/6)/2 = (³⁾11/2 + 11/6)/2 = 44/12 = 11/3

d) a = 1-4/5 = 1/5 ; b = 1+0,8 = 1+8/10 = 18/10 = 9/5

ma(a,b) = (1/5+9/5)/2 = 10/10 = 1

e) a = 2√6 ; b = 8√6 => ma(a,b) = (2√6+8√6)/2 = 10√6/2 = 5√6

f) a = 3√5 ; b = 17√5 ; ma(a,b) = (3√5+17√5)/2 = 20√5/2 = 10√5

g) a = √63 - 2√2 = 3√7 -2√2 ; b = √7 + √8 = √7 + 2√2 =>

ma(a,b) = (3√7-2√2+√7+2√2)/2 = 4√7/2 = 2√7

h) a = 1+√2+√3 ; b = 2+√12+√50 = 2+2√3+5√2

ma(a,b) = (1+√2+√3+2+2√3+5√2) /2 = (6√2+3√3+3)/2 =

= (3/2)·(2√2+√3+1)

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