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Q.

The total number of terms in the expansion of (x+a)100+(x-a)100 is

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a

202

b

51

c

101

d

50

answer is B.

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Detailed Solution

The total number of terms in the expansion of x+an+ x-an is n2+1 if n is even and n+12 is n odd. ∴The total number of terms in the expansion of x+a100+ x-a100 is 1002+1=51

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