Matematika

Pertanyaan

Jika diketahui a = 2/3b, c = 3/2a, dan abc = 18 maka nilai b?
A. 3
B. 2
C. 1
D. 3/2
E. 1/3

2 Jawaban

  • Take it easy !

    Known :
    ⇒ a = ²/₃
    ⇒ b = ³/₂
    ⇒ abc = 18

    Asked :
    ⇒ c = ... ?

    ≡ abc = 18
    ≡ ²/₃ . ³/₂ . c = 18
    ≡ ⁶/₆ . c = 18
    ≡ c = 18

    So , The mark of c = 18

  • a= 2/3 b
    c = 3/2 a
    b =...?

    abc = 18
    2/3 b x b x 3/2 a = 18
    2/3 b x b x 3/2 x 2/3 b = 18
    b^3 x 2/3 = 18
    b^3 = 18 x 3/2
    b^3 = 27
    b = 3

    A. 3

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