Practice Test Discussion

Q)

The value of following expression lies between,

(1111)3+ (2212)3(3.323)3(1.111)(2212)(- 3.323)

[New India Insurance (A0), 2011]


  • Explanation

    Here, Given expression is(1111)3+ (2212)3(3.323)3(1.111)(2212)(- 3.323)Here, put a= 1.111, b = 2.112and         c = 3.323So, given expression can also be written asa3+ b3+(-c)3abcNow, here, a + b + c = 0Hence, a3+ b3+ c3= 3abcSo,       3abcabc=3So, its value lies between 2.5 and 3.5.

    Hence, option E is correct.

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