antara bilangan 250 smpe 1000 yg habis di bagi 7
Matematika
emiliaputri1
Pertanyaan
antara bilangan 250 smpe 1000 yg habis di bagi 7
1 Jawaban
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1. Jawaban khominghoo
250 : 7 = 35 sisa 5
U1 = (35x5)+7 = 252
1000/7 = 142 sisa 6
Un = 142 x 7 = 994
a = 252
b = 7
Un = 252-7 + 7n = 7n + 245
994 = 7n + 245
7n = 994-245 = 749
n = 749/7 = 107
S107 = 107/2 x (252+994) = 107 x 623 = 66.661