Matematika

Pertanyaan

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1 Jawaban


  • [tex]2x {}^{2} - 3x + 1 = 0 \\ (x - 1)(2x - 1) = 0 \\ \\ x - 1 = 0 \\ x = 1 \\ \\ 2x - 1 = 0 \\ 2x = 1 \\ x = \frac{1}{2} \\ \\ jadi , \\ \: x 1 \: , \: x2 = 1 \: , \: \frac{1}{2} [/tex]

    Jadi :
    [tex] \frac{1}{x1} + \frac{1}{x2} \\ = \frac{1}{1} + \frac{1}{ \frac{1}{2} } \\ = \frac{1}{1} + 1 \times \frac{2}{1} \\ = 1 + 2 \\ = 3[/tex]

    Jawabannya : E