JEE Main Mathematics problem 21: Find the arithmetic mean of 6 and 9.
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(6+9)/2=7.5.
Practice India questions with answers and explanations.
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(6+9)/2=7.5.
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Increase/base ×100 = 25%.
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The units digit follows from 5³.
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8²+21²=505.
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Area=9×5=45.
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By Vieta, root sum is the coefficient 18.
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Increase/base ×100 = 25%.
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14²+20²=596.
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Area=15×4=60.
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By Vieta, root sum is the coefficient 23.
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(17+10)/2=13.5.
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By Vieta, root sum is the coefficient 13.