Question #144492
You have given a function λ : R → R with the following properties (x ∈ R, n ∈ N):

λ(n) = 0 , λ(x + 1) = λ(x) , λ(n+1/2)=1
Find two functions p, q : R → R with q(x)6=0 for all x such that λ(x) = q(x)(p(x) + 1).
1
Expert's answer
2020-11-18T19:34:54-0500

for nN:p(n)=1,q(n)=cn \in \N : p(n) = -1, q(n) = c (can be any function, except 0, by condition)

p(n+12)=0,q(n+12)=1p(n+\frac{1}{2}) = 0, q(n+\frac{1}{2}) = 1

for xR:p(x)=0,q(x)=xmod1x \in \R : p(x) = 0, q(x) = x \mod 1

where xmod1=x%1=xxx \mod 1 = x \% 1 = x - \lfloor x \rfloorin another words it is remainder of division by 1


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