Grade 99 grade maths
If X = 9 – 4sqrt5, find (A) X+ 1/X (B) sqrtX + 1/sqrtX
If X = 9 – 4sqrt5, find (A) X+ 1/X
(B) sqrtX + 1/sqrtX
1 Answer
Arun
Approved Tutor Answer7 Years agoDear student
1/x = 1/ 9 – 4 sqrt 5
= 9 + 4 sqt 5 / (81 – 80) = 9 + 4 sqrt 5
x + 1/ x = 18
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