1.

यदि `a=11` और `b=9` है तो `((a^(2)+b^(2)+ab)/(a^(3)-b^(3)))` का मान ज्ञात करें?A. `1/2`B. `2`C. `1/20`D. `20`

Answer» Correct Answer - A
`a=11`
`b=9`
`implies(a^(2)+b^(2)+ab)/(a^(3)-b^(3))`
`implies (a^(3)-b^(3))=(a-b)(a^(2)+ab+b^(2))`
`:. (a^(2)+b^(2)+ab)/((a=b)(a^(2)+ab+b^(2))`
`=1/(a-b)=1/(11-9)=1/2`


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