define A(x) by A(x) = Σ a(n), n≤x .: Let a(n) be an arithmetical function. We where A(x) = 0 if x < 1. Let f has continuous derivative on the interval [y, x], where 0

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define A(x) by
A(x) = Σ a(n),
n<x
: Let a(n) be an arithmetical function. We
where A(x) = 0 if x < 1.
Let f has continuous derivative on the interval [y, x], where 0 < y < x. Then we have
Cx
Σ a(n)ƒ(n) = A(x)ƒ(x) — A(y)ƒ(y) — [*ª* A(t)ƒ' (t)}dt
y<n<x
Y
Transcribed Image Text:define A(x) by A(x) = Σ a(n), n<x : Let a(n) be an arithmetical function. We where A(x) = 0 if x < 1. Let f has continuous derivative on the interval [y, x], where 0 < y < x. Then we have Cx Σ a(n)ƒ(n) = A(x)ƒ(x) — A(y)ƒ(y) — [*ª* A(t)ƒ' (t)}dt y<n<x Y
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