What is the total number of terms in the algebraic expansion of ?

Answer and explanation

Correct answer: A.

  1. Step 1: The number of distinct terms in the multinomial expansion of is given by the combination formula .
  2. Step 2: Here and the number of variables is .
  3. Step 3: Substitute and : .
Answer
.
Why not the others: is , using ; is , using ; is .

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