find a+1/a if a=2+ROOT3
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Answered by
2
1/a of value rationalise
then
2+√3+2-√3
4 is correct answer
then
2+√3+2-√3
4 is correct answer
silent112:
please mark as brainlist
only one answer is there no others have answered
if anyone comment answer then pl my answer mark
Answered by
1
a=2+root 3...(1)
1/a=1/(2+root 3)=rationalising the denominator by multiplying numerator and denominator by-
(2-root 3)
1/a=(2-root 3)/(2^2-root 3^2)
1/a=2-root 3......(2)
Adding (1) and (2),
a+1/a=4
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