Diketahui barisan u3=16,u6=7 maka,u8=.... adalah
Matematika
samsungJ51
Pertanyaan
Diketahui barisan u3=16,u6=7 maka,u8=.... adalah
2 Jawaban
-
1. Jawaban cupid85
U3 = a + 2b = 16
U6 = a + 5b = 7
------------------------(-)
- 3b = 9
b = - 3
a + 2b = 16
a + 2(-3) = 16
a - 6 = 16
a = 16 + 6
a = 22
U8 = a + 7b
= 22 + 7(-3)
= 22 - 21
= 1 -
2. Jawaban intregal
U3 = a+2b
16 = a+2b
U6 = a+5b
7 = a+5b
a+2b = 16
a+5b = 7
----------------- -
-3b = 9
b = -3
a+2b =16
a+ 2(-3) = 16
a-6 =16
a =22
U8 = a+ 7b
U8= 22 +7(-3)
U8 =22-21 =1