Penjelasan dengan langkah-langkah:
1.) b = 2
suku ke 25
=> 25×2
= 50
2.) b = 3
suku ke 20
=> (20-1)×3
= 57
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Penjelasan dengan langkah-langkah:
1.) b = 2
suku ke 25
=> 25×2
= 50
2.) b = 3
suku ke 20
=> (20-1)×3
= 57