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प्रश्न
If x = 2, y = 5 and z = 4, find the value of the following:
xy ÷ y2z
योग
उत्तर
`"xy"/("y"^2"z")="x"/("y"^(2-1)"z")="x"/"yz"=2/(5xx4)=1/10`
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Concept of Substitution
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