Jawabanmu

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2014-06-01T20:19:19+07:00
U2 = 5 » a + (2-1)b = 5 » a + b - 5 = 0 U6 = 29 » a + (6-1)b = 29 » a + 5b - 29 = 0 Lalu di eleminasi, atau dengan cara : A + b - 5 = a + 5b - 29 A - a + b - 5b = -29 + 5 -4b = -24 B = -24/-4 B = 6. Trus, U2 = a + b 5 = a + 6 5-6 = a -1 = a Lalu, U10 = a + (10-1)b U10 = -1 + (9)6 U10 = -1 + 54 U10 = 53 Dan, S10 = n/2 . (A+Un) S10 = 10/2 . (-1 + 53) S10 = 5 . 52 S10 = 260