If x= 7+4 root 3 then find the value of root x +1/root x
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Given:
x = 7+ 4√3
√x+1/x = √[(7+4√3)+1/7+4√3]
= √(8+4√3/7+4√3)
= √[8+4√3/7+4√3] * [7-4√3 / 7-4√3]
= √[56-32√3+28√3-16*3 / 49-48]
= √[56-4√3 / 1]
= √[8-4√3]
= √[4(2-√3)]
= 2√(2-3)
x = 7+ 4√3
√x+1/x = √[(7+4√3)+1/7+4√3]
= √(8+4√3/7+4√3)
= √[8+4√3/7+4√3] * [7-4√3 / 7-4√3]
= √[56-32√3+28√3-16*3 / 49-48]
= √[56-4√3 / 1]
= √[8-4√3]
= √[4(2-√3)]
= 2√(2-3)
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