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= 1/2³ + 1/3²
= 1/8 + 1/9 Penyebut disamakan
= 9/72 + 8/72
= 17/72 (B)
4. 3√50-2√18+√98
=3√25x√2 -2√9x√2 + √49x√2
= 3x5√2 - 2x3√2 + 7√2
= 15√2 - 6√2 + 7√2
= (15-6+7)√2
= 16√2 (C) /('_')/ jangan lupa