Grade 99 grade maths
If x+1/x = 10/3 then please find the value of x^3-1/x^3
If x+1/x = 10/3 then please find the value of x^3-1/x^3
1 Answer
Arun
Approved Tutor Answer8 Years agoDear student
x + 1/x = 10/3
3x² -10x +3 = 0
x = 3 and 1/3
Now
x³ - 1/x³
If x = 3
= 27 - 1/27 = 728/27
Now if x = 1/3
1/27 - 27 = -728/27
Regards
Arun
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