Question

Ajutati-ma click pe poza va rog vreau rezolvate

Answer 1

1. a) $mg= \sqrt{25*4}=5*2=10$
 b) $3 \sqrt{3}- \sqrt{27} = 3 \sqrt{3}- 3 \sqrt{3} = 0$
 c) $2^{10} : 4= 2^{10 } : 2^{2} = 2^{10-2}= 2^{8}=256$
2. a) F 
b) A
c) F

Answer 2

1)
a)mg=√25*4=5*2=10
b) 3√3-√27=3√3-3√3=0
c)2¹⁰ x1/4 =2¹⁰ x1/2² = 2¹⁰⁻²=2⁸

2)
a) 2√5+3√5=8√8    F
b) 3/√3 = 3√3/3=√3         A
c) ma=(√2+1+√2-1)/2=2√2/2=√2   A

3.
a) 2/3 :2² +5/6 = 1/6+5/6=6/6 = 1      raspuns corect C
b) I2-√5I -(2+√5)=√5-2-2-√5=-4          raspuns corect D
2-√5 <0
I2-√5I=-(2-√5)=√5-2
c) 1/(2+√5) +1/(2-√5) =(2-√5+2+√5)/(4-5)=4/(-1)=-4  raspuns corect B
d)  a=√(1+√2)² b=I1-√2 I  1-√2<0    I1-√2 I =-(1-√2) =√2-1
(a+b)/2=(1+√2+√2-1)/2=2√2/2=√2      raspuns corect D