u7 dan u10 dari barisan 1,3,6,10,... adalah...
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Jawaban:
u7 = 13
u10 = 19
Penjelasan dengan langkah-langkah:
a = 1
b = 2
n = 7
un = a + ( n-1 ) •b
u7 = 1 + ( 7-1 ) • 2
= 1 + 6 • 2
= 1 + 12
= 13
______________
a = 1
b = 2
n = 10
un = a + ( n-1 ) •b
u10= 1 + ( 10-1 ) •2
= 1 + 9 • 2
= 1 + 18
= 19
[answer.2.content]
