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**Integrals-please check out...**

Q

1)double integral over[ (0 to a/sq.root 2),(y to sq.root of (a2-y2)] fn->log(x2+y2)dxdy &a>0

2)int (0to pi/2) d(theta) int(0 to a sin theta) dr int(0 to (a2-r2)/a) r dz

3)evaluate triple integral over V funtion=> z dx dy dz, where V is the solid tetrahedron bounded by the 4 planes..x=0,y=0,z=0&x+y+z=1