Question

If x-1/x=2.23,find the values of x^2 +1/x^2,x+1/x,x^3+1/x^3

Answer 1

Answer:

x-1/x=2.23

x-1 = 2.23 x

x-2.23x = 1

-1.23x = 1

x = 1/-1.23

x^2 +1/x^2

= (1/-1.23)^2 + 1/(1/-1.23)^2

= 2.17 (answer )

x+1/x

=  1/-1.23 + 1/ 1/-1.23

= 1/-1.23 - 1.23

= - 2.04 (answer)

x^3+1/x^3

=  (1/-1.23)^3 +1/( 1/-1.23)^3

= - 2.39 (answer)

it can be done using formula too.........

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