February 2019 1 36 Report
1. Suku ke -n suatu barisan aritmatika dirumuskan dengan Un = 5n² - 4. Suku ke 8 barisan tsb adalah....

2. Diketahui deret aritmatika dgn suku pertama dan suku ke -4 berturut-turut -1 dan 5. jumlah 7 suku pertama deret tsb adalah...
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