If a= 2+root2 find the value of a-1/a
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1/a = 1/2+√2
= 1/2+√2×2 - √2/2-√2
= 2-√2/2
=1-√1 = 0
a-1/a = 2+√2-0 = 2+√2
= 1/2+√2×2 - √2/2-√2
= 2-√2/2
=1-√1 = 0
a-1/a = 2+√2-0 = 2+√2
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