Question

ofer 100p URGENT VA ROOOG!!!
PUNCTELE C SI D
LA 8 FIECARE PUNCT ARE A SI B
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Answer 1

Răspuns:

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Explicație pas cu pas:

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Answer 2

Răspuns:

c) 2√5-4√5+(2√5+9√5-7√5)= -2√5+2√5 =0

d)√5+( -3√5+6√5)-(-3√5-9√5)=√5+ 3√5 -( -12√5) =4√5+12√5 =16√5

8) c) A=7√11+4√11-9√11+√11 =11√11-9√11+√11=2√11+√11=3√11

B=26√11 -10√11-7√11-6√11 =16√11 -7√11 -6√11 =9√11 -6√11 =3√11

A+2B =3√11 +2*3√11 =3√11+6√11 =9√11

2A-B =2*3√11 -3√11 =6√11 -3√11 =3√11

A+2B/2A-B =9√11 /3√11 =3 ∈Q

d) A = -6√6-5√6+7√6+2√6

A= -11√6 +7√6 +2√6

A=-4√6+2√6 = -2√6

B=4√6 -10√6 +3√6+2√6

B= -6√6+3√6 +2√6

B= -3√6+2√6 = -√6

A+2B =-2√6 +2*(-√6) = -2√6-2√6 = -4√6

2A -B =2*(-2√6)- (-√6) = -4√6 +√6 = -3√6

A+2B/2A-B =-4√6/ -3√6 =4/3 ∈Q

Explicație pas cu pas: