If ∫ 0 ∞ sin ( x 2 ) ln 2 x d x = 4 1 R π ( π + O 1 ψ ( H ) ( A 1 ) ) N
is true for non-negative integers R , O 1 , H , A , N then find R + O 1 + H + A + N
Note: ψ ( m ) ( z ) is the Polygamma function i.e ( m + 1 ) t h derivative of ln ( Γ ( z ) )
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I = ∫ 0 ∞ sin ( x 2 ) ln 2 x d x
Substituting x 2 = t
I = 8 1 ∫ 0 ∞ t − 2 1 sin t ln 2 t d t
Define J ( a ) = 8 1 ∫ 0 ∞ t a − 1 sin t d t = 8 1 ∫ 0 ∞ t a ( k = 0 ∑ ∞ k ! Γ ( 2 + 2 k ) ( − 1 ) k t 2 k Γ ( k + 1 ) ) d t
Using Ramanujan's Master theorem this evaluates to J ( a ) = 1 6 1 Γ ( s ) ϕ ( − s ) where s = 2 a + 1 and ϕ ( k ) = Γ ( 2 + 2 k ) Γ ( k + 1 )
What we need to find I is just J ′ ′ ( 1 / 2 ) which from above formulation would yield the answer as 4 1 1 2 8 π ( π + 2 ψ ( 0 ) ( 2 1 ) ) 2