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Q.

If r=0nf(x+ra)=0 where a>0 then the period of f(x) is

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a

f(x) is non periodic

b

an+1

c

a

d

(n+1)a

answer is B.

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Detailed Solution

f(x)+f(x+a)+...+f(x+na)=0....(1) replace x by x+a we get 

f(x+a)+f(x+2a)+....+f(x+(n+1)a)=0...(2)(1)f(x)f(x+(n+1)a)=0

f(x+(n+1)a)=f(x)

f(x) is periodic with period a(n+1)

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