In the expansion (a + x)^n, the exponent of 'x':
Correct answer: B. Increases from 0 to n
- A. decreases from n to 0
- B. Increases from 0 to n
- C. remains n everywhere
- D. becomes 0 at the end
Explanation
In the expansion of (a + x)^n, the general term is given by:(n choose r) a^(n-r) x^rWhere:n is the exponent of the binomial expressionr is the index of the term in the expansionAs the index r increases from 0 to n, the exponent of 'x' (which is r) increases from 0 to n.
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