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If `f(x)` is a function such that `f(x-1)+f(x+1)=sqrt(3)f(x) and f(5)=10,` then the sum of digit of the value of `sum_(r=0)^19 f(15+12r)` is

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If f(x) is a function such that f(x-1)+f(x+1)=sqrt3t(x) and f(5)=100 , then find sum_(t=0)^(19)f(5+12r) .

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