Question

1)scrieti in ordine crescatoare numerele:
a)3,(5); -3√5; -5√3
b)4pe7; √4pe7; -7pe4
c)4intregi1pe2; I-4intregi2pe3; √20
d)-8intregi1pe3; -8,1(3); -8,3(1)

Answer 1

Bună!

a) 3,(5)=3,55...

-3√5=-3×2,236=-6,70...

-5√3=-5×1,732=-8,66...

-8,66<-6,70<3,55 ⇒ -5√3<-3√5<3,(5) ✔

b) 4/7=0,57...

√4/7=2/7=0,28...

-7/4=-1,75

-1,75<0,28<0,57 ⇒ -7/4<√4/7<4/7 ✔

c) $4\frac{1}{2} =\frac{9}{2} =4,5$

$-4\frac{2}{3} =-\frac{14}{3} =-4,66...$

√20=2√5=2×2,236=4,47...

-4,66<4,47<4,5 ⇒ $-4\frac{2}{3} <\sqrt{20}<4\frac{1}{2}$ ✔

d) $-8\frac{1}{3} =-\frac{25}{3} =-8,33...$

-8,1(3)=-8,133...

-8,3(1)=-8,311...

-8,33<-8,311<-8,113 ⇒ $-8\frac{1}{3}<-8,3(1)<-8,1(3)$ ✔