1 . কোনটি a3 + 1 -এর উৎপাদক?

  • A. (a + 1)(a + 1)
  • B. (a + 1)(a2 + a + 1)
  • C. (a - 1)(a2 - a + 1)
  • D. (a + 1)(a2 - a + 1)
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