Practicing Success
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CUET
General Test
Quantitative Reasoning
Algebra
x = a - \(\sqrt {3}\)
y = a
z = a +\(\sqrt {3}\)
then x3 + y3 + z3 - 3xyz = ?
37a
27a
a
18a
If x, y and z are in A.P
then x3 + y3+ z3 - 3xyz = 9 × mid term × (a)2
= 9 × a × (\(\sqrt {3}\))2
= 27a