Jawabanmu

Jawaban paling cerdas!
2014-04-14T10:06:05+07:00
3a+3b = 27 5a+10b = 85 => menggunakan cara eliminasi didapat 15b = 120 => b = 8 => 3a+3(8)=27 => 3a+24=27 => 3a=3 = a=1 ==> U4 =a+3b => 1+24 =25
jadikan terbaik ya..
dapetnya 5a + 10b = 85 itu gimana .. ? kenapa 5a ditambahin sama 10b? @compek
pakek rumus Sn=n/2 (2a+(n-1)b)
thank you copek :)
sama-sama..
2014-04-14T10:24:31+07:00
3a+3b = 27 5a+10b = 85 

15b = 120 
= b = 8
=> 3 a+3 x 8 =27 
= 3a+ 24= 27 
= 3a =3 = a =1 

= U4
=a + 3 
=1 + 24
=25
1 5 1