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a-7-P-x-a-0-b-9-Q-y-b-0-for-a-b-N-And-A-A-A-x-y-P-x-Q-y-0-A-B-A-x-y-A-x-y-Then-t-N-B-n-t-f-P-x-Q-y-also-only-t-can-be-in-N-M-find-M-

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Question Number 45840 by Rauny last updated on 17/Oct/18
a≦7⇒P(!∃x_a )=0, b≦9⇒Q(!∃y_b )=0 for a, b∈N And A⊋A′: A={(x, y)∣P(x)∙Q(y)=0}=A′, B_(∈A) ={(x, y)∈A∣x=y} Then ∀t∈N: ∣B∣=n(t)=f(P(x), Q(y)), also only t can be in [N, M]. find M. :(
a≦7⇒P(!∃xa)=0,b≦9⇒Q(!∃yb)=0fora,b∈NAndA⊋A′:A={(x,y)∣P(x)⋅Q(y)=0}=A′,B∈A={(x,y)∈A∣x=y}Then∀t∈N:∣B∣=n(t)=f(P(x),Q(y)),alsoonlytcanbein[N,M].findM.:(

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