tolong dibantu kakak2 semua ^^

Kelas 12 Matematika
Bab Barisan dan Deret Bilangan

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∑ ((i² + 2)/x) = 195
i = 1

(1² + 2)/x + (2² + 2)/x + (3² + 2)/x + (4² + 2)/x + (5² + 2)/x = 195
(3 + 6 + 11 + 18 + 27)/x = 195
x = 65/195
x = 1/3