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2.15. jf(x + y)d x d y,D : у = x3,y = 8 ,y = 0,x = 3 .<br />

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2.16. ^x(2x+ y)dxdy,l> . у = l-x 2,y£0.<br />

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2.17. ^ y(\ -x )d x d y,I > .y = x, у = x.<br />

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2.18. \\xy dxdy, I>. y 2 - l-x,x£0.<br />

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2.19. JJx(y + 5)«My, J>. у = x+5, x + y +5 =* 0, x£0.<br />

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2.20. Jf(x-y)abc

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