Question

Demontrati ca :
B) (n + 3,2n + 7) = 1
C) (4n + 5,5n + 6) = 1

Answer 1

desfacem parantezele
n+3,2n+7=1
n+3,2n= 1-7 = -6
4,2n = -6
n= -6 :4,2 
n=1,42

Answer 2

c).(N+3,2n+7)=1
N+3,2n+7=1
N+3,2n=1-7
4,2n=-6
N=-6/-4,2
N=-1,43

c).(4n+5,5n+6)=1
4n+5,5n=1-6
9,5n=-5
N=9,5/-5
N=1,9