If a=1-√2, find (a-1/a)³
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a=1-√2 then a-1=1-√2-1
=a=1-√2+1
a=√2
so,here a-1=√2
(a)^3=a^3
so (√2/a^3)
=(√2/(1-√2))^3
=2√2/5-5√2
=a=1-√2+1
a=√2
so,here a-1=√2
(a)^3=a^3
so (√2/a^3)
=(√2/(1-√2))^3
=2√2/5-5√2
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