• 2021 April(Z04) Math Question 57

    Algebraic & Function Expressions

    - Systems of Equations

    Solving equations, Solving pairs of equations, Undefined fraction
    Choice D

    b+cd\frac{b+c}{d} is undefined, therefore

    d=0d = 0
    abc=dabc=d
    ac=1ac=1
    =>ac⋅b=d=> ac \cdot b=d
    =>1×b=0=>1 \times b = 0
    =>b=0=> b=0

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