tentukan suku ke 70 dan barisan bilangan
1. 64,62,60
2. 2,11,20
3. 16,13,10
Tolong di jawab dongg
1. 64,62,60
2. 2,11,20
3. 16,13,10
Tolong di jawab dongg
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no 2
maaf kalau salah
Jawaban:
1. -74
2. 623
3. -191
Penjelasan dengan langkah-langkah:
1. Un = a+(n-1)b
U70 = 64+(70-1)-2
= 64+(69)-2
= 64+(-138)
= -74
2. U70 = 2+(70-1)9
= 2+ (69)9
= 2+ 621
= 623
3. U70 = 16+(70-1)-3
= 16+(69)-3
= 16+(-207)
= -191
semoga membantu
silahkan bertanya jika belum jelas