Cara kerja
ditanyakan Sn...?
a = U1
= 4
U5 = 108
S5 = n/2 (a + U5)
= 5/2 (4 + 108)
= 5/2 (112)
= 5 (56)
= 280
jadi panjang tali semula yaitu 280 meter
Mapel : Matematika
Bab : Barisan dan deret
Kode : 9.2.2
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Cara kerja
ditanyakan Sn...?
a = U1
= 4
U5 = 108
S5 = n/2 (a + U5)
= 5/2 (4 + 108)
= 5/2 (112)
= 5 (56)
= 280
jadi panjang tali semula yaitu 280 meter
Mapel : Matematika
Bab : Barisan dan deret
Kode : 9.2.2