Question

Media aritmetica a trei numere consecutive este 17
.Aflati numerele

Answer 1

(A+A+1+A+2):3=17
3A+3= 17x3
3A=51-3
3A=48
A=48:3
A=16
B=A+1=16+1=17
C=A+2=16+2=18

Answer 2

Ma = 17
nr. consecurive = a, a + 1, a + 2
Ma = ( a + a + 1 + a + 2) / 3
Ma = ( 3a + 3) / 3
Ma = 17 ⇒
( 3a + 3) / 3 = 17
3a + 3 = 3 · 17
3a + 3 = 51
3a = 51 - 3
3a = 48
a = 48 : 3
a = 16,, primul numar
a + 1 = 16 + 1 = 17 , al doilea numar
a + 2 = 16 + 2 = 18, al treilea numar.
16, 17 , 18