Question

Plsssss repede matematicienii Brainly! ​

Answer 1

Răspuns:

a)2[x+4]-[x+3]=5

[x+4]=[x]+4

[x+3]=[x]+3

2([x]+4)-([x]+3}=5

2[x]+8-[x]-3=5

[x]+5=5

[x]=0

x∈[0,1)

b)

[x]=(x-1)/2

[x]=k   k∈Z=>

(x-1)/2=k

[x]=k=>

(x-1)/2=k

x=2k+1=.>

[2k+1]=k

2k+1=k

2k-k= -1

k= -1

x=2*(-1)+1

x=-2+1

x= -1

Explicație pas cu pas: