Math

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Find the sum of the G.p.2+6+18+54+...+1458

  • Math -

    a = 2
    r = 3
    2*729 = 1458
    729 = 3^6, so

    S7 = 2(3^7-1)/(3-1) = 2*2186/2 = 2186

  • Math -

    Solve the equation simultaneously.1/3x+y=3,x+1/2y=4

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