If a =2+√3 then find the Value of a- 1/a
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Answer:
2√3
Step-by-step explanation:
a = 2+ √3
Then,
1/a = 1/(2+√3)
= 1× (2-√3)/(2+√3)(2-√3) [Rationalize ; multiply numerator and
= (2-√3)/ (2)²-(√3)² denominator by (2-√3)]
= (2-√3)/(4-3)
=(2-√3)/1
= 2-√3
Then,
a - 1/a = 2+√3-(2-√3)
=2+√3-2 +√3
=2√3
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