Mathématiques

Question

If x+(1/x)=5 find x^2+(1/x^2)

1 Réponse

  • If X+1/x=5 find the value of x2+1/x2
    Given x + 1 /x ) = 5

    We need to find X2+ 1 / x2

    ( x + 1 / x )2 = 25

    = x2 + 1 / x2 + 2 (x)(1)(1/x) =25

    = x2 + 1/x2 + 2 = 25

    = X2 + 1 / x2 = 25 – 2

    = X2+ 1 / x2=23

    Hence X2+ 1 / x2= 23

Autres questions