1.

II IUJW) TU UJ,Wellmu lile value of (20-b).If the numbers a, 9, b, 25 form an AP, find a and b.ICE[CE

Answer»

Since a,9,b,25 form an AP9-a=b-9=25-b=common differencenowb-9=25-b2b=25+92b=34b=17

now,9-a=b-9a=9+9-ba=18-17=1thus a=1; b=17



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