RRB JE Stage I 30 May 2019 Shift 1 (HM)

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Question : 7 of 100

Marks: +1, -0

सरल कीजिए:

{(375 \×375)+(125 \×125)-(375 \× 125)}/{(375 \× 375 \×375)+(125 \×125 \× 125)}

${1}/{1000}$
${1}/{3}$
500
${1}/{500}$

Solution:

माना,

375=a

एवं

125=b

\∴

व्यंजक

={a^{2}+b^{2}-a b}/{a^{3}+b^{3}}

={a^{2}+b^{2}-a b}/{(a+b)(a^{2}+b^{2}-a b)}

={1}/{a+b}={1}/{375+125}

={1}/{500}

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