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Mathematics for IGCSE & O level - Number (Section 2 - No. 41)

What is the product of prime factors of 198?
2 x 3 x 11
2 x 3^2 x 11
2 x 3 x 3 x 11
3 x 2 x 33

解释

The prime factorization of 198 is 2 * 3 * 3 * 11 = 2 * 3^2 * 11.

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