x+ 1/x =3
then find x^4 + 1/x^4



pls solve.​

1 thought on “x+ 1/x =3 <br />then find x^4 + 1/x^4<br /><br /><br /><br />pls solve.​”

1. Answer:

   47

   Step-by-step explanation:

   Given,

   => x+ 1/x =3

   => x^2 + (1/x^2) + 2= 9 [Squaring both sides {a^2 + b^2 + 2ab=(a+b)^2}

   => x^2 + (1/x^2)= 9-2= 7

   Now again squaring the above equation,

   x^4 + (1/x^4) + 2= 49

   x^4 + (1/x^4)= 49-2= 47

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