Question

Exercitiul 12 va rog! ​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 13  ;  √7 + 6  ; -1-√7

ma(13 , √7 + 6 ,  -1-√7) = (13+√7+6-1-√7)/3 = 18/3 = 6

b) a =10+2√5  ; b = 3-4√5  ; c =2√5-6√7 ; d =6√7+11  

ma(a,b,c,d) = (a+b+c+d)/4 = (10+2√5+3-4√5+2√5-6√7+6√7+11)/4=

= 24/4 = 6

Answer 2

$m_a=\frac{a+b+c}{3} \\m_a=\frac{13+\sqrt{7}+6-1-\sqrt{7} }{3} \\m_a=\frac{13+6-1}{3} \\m_a=\frac{18}{3} =6$

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$m_a=\frac{a+b+c+d}{4} \\m_a=\frac{10+2\sqrt{5} +3-4\sqrt{5} +2\sqrt{5} -6\sqrt{7} +6\sqrt{7} +11 }{4} \\m_a=\frac{10+2\sqrt{5} +3-4\sqrt{5} +2\sqrt{5} +11 }{4} \\m_a=\frac{24+2\sqrt{5} -4\sqrt{5} +2\sqrt{5} }{4} \\m_a=\frac{24-2\sqrt{5}+2\sqrt{5} }{4} \\m_a=\frac{24}{4}=6$