Matematika

Pertanyaan

tolong dengan cara
[tex](3 {}^{10} + 3 {}^{ - 8} ) {}^{2} - (3 {}^{10} - 3 {}^{ - 8} ) {}^{2} [/tex]

1 Jawaban

  • Kelas 9 Matematika
    Bab Akar dan Pangkat

    ^ = pangkat

    (3^10 + 3^(-8))² - (3^10 - 3^(-8))²
    = (3^10 + 3^(-8) + 3^10 - 3^(-8)) . (3^10 + 3^(-8) - 3^10 + 3^(-8))
    = (2 . 3^10) . (2 . 3^(-8))
    = 4 . 3^(10 - 8)
    = 4 . 3²
    = 4 . 9
    = 36

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