Question

va rog mult am nevoie urgent 3 si 5!!
Dau coroanaa

Answer 1

3) A={–2,5;√11/2; √23/4; –3,5(6); √17; 19/4; 31/12; √5}
AnQ={–2,5;–3,5(6); 19/4; 31/12; √11/2; √23/4}
An(R\Q)={√17; √5}
4) a) x=2,4 sau 12/5 si y=15
ma=(x+y)/2=(2,4+15)/2
ma=17,4/2=9,9
mg=√a•b=√12/5•15=√12•3=√36=6
b) x=2√6 si y=3√6
ma=(x+y)/2=(2√6+3√6)/2
ma=5√6/2
mg=√a•b
mg=√(2√6•3√6)
mg=√6•6
mg=√36
mg=6
5) a) 7/12:(1/6–3/4)–2 intregi 1/3* 1 intreg 2/7
=7/12: (–1/12)–7/3*9/7
=7/12*(-12)–3
=–7–3
=–10
b) √27*2√12+√100/√20–√225/√45
=3√3*4√3+√(100/20)–√(225/45)
=36+√5–√5
=36
c) (9/√3–2√3)*√3/4–√169/16
=(9√3/3–2√3)*√3/4–13/4
=(3√3–2√3)*√3/4–13/4
=√3*√3/4–13/4
=3/4–13/4
=(3–13)/4
=–10/4
=–5/2