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{:(,"Borax bead test",,),(1.,"Copper","a...

`{:(,"Borax bead test",,),(1.,"Copper","a.","Blue"),(2.,"Iron","b.","Grey"),(3.,"Manganese","c.","Red"),(4.,"Cobalt","d.","Bottlegreen"),(5.,"Chromium","e.","Colorless"),(,,"f.","Green"):}`

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{:(1.,"Borax","a.","Allotrope of carbon"),(2.,"Graphite","b.",Na_(2)B_(4)O_(7)),(3.,"ZnO","c.","Ozone"),(4.,"CFCs","d.","Neutral oxide"),(5.,NH_(3),"e.","Fertilizer"),(,,"f.","Fixation of nitrogen"):}

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{:(1,"Chlorophyll 'b'",(i),"Brown Algae"),(2,"Chlorophyll 'c'",(ii),"Red Algae"),(3,"Chlorophyll 'd'",(iii),"Xanthophycean Algae"),(4,"Chlorophyll 'e'",(iv),"Green Algae"):}

{:(1.,"Iron deficiency ",(i),"Grey spot on oat leaves"),(2.,"Manganese deficiency",(ii),"Reclamation disease of cereals"),(3.,"Copper deficiency",(iii),"Khaira disease of rice"),(4.,"Zinc deficiency ",(iv),"Short and slender stalk"):}

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f={(2, 1), (3, b), (4, b), (5, c)} is a____.

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If A=[(1,2,-3),(5,0,2),(1,-1,1)],B=[(3,-1,2),(4,2,5),(2,0,3)] and C=[(4,1,2),(0,3,2),(1,-2,3)] , then compute (A+B) and (B-C) . Also, verify that A+(B-C)=(A+B)-C .

Let X = { 1,2,3,4}, Y = {a,b,c,d} and f={(1,a), (4,b), (2,c),(3,d),(2,d)}. Then f is