Question

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1.If x+1/x = √5, find x2+1/x2 and x41/x4
2.If x2+ 1/x2= 66, find x-1/x
3.If 3x -7y = 10, xy=-1, finf 9x +49y2
4.If a2 +b2+c2 =250, ab+bc+ca =3, find a+b+c
5.If x²+ 1/x2= 83, find x3-1/x3
6.Ifx - 1/x = 3 +2 √2, find x3-1/x3​

Answer 1

Answer:

x+ 1/x = 5

x2 + 1/x2 = 25 -2 =23