यदि $\frac{3x}{(x-a)(x-b)} = \frac{2}{x-a} + \frac{1}{x-b}$ है,तो $a:b$ का मान ज्ञात कीजिए।

  • A
    $1:2$
  • B
    $-2:1$
  • C
    $1:3$
  • D
    $3:1$

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