$a$ ના કયા મૂલ્યોના ગણ માટે અસમતા $\int_{a}^{0} (3^{-2x} - 2 \cdot 3^{-x}) \, dx \geq 0$ સત્ય છે?

  • A
    $[0, 1]$
  • B
    $(-\infty, -1]$
  • C
    $[0, \infty)$
  • D
    $(-\infty, -1] \cup [0, \infty)$

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