if x-1/x =7,find the valuex4+1/x4
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x-1=7x
x-7x=1
-6x=1
x= -1/6
x^4 + 1 /x^4 = (-1/6)^4+1/(-1/6)^4
= 1+216
= 217
x-7x=1
-6x=1
x= -1/6
x^4 + 1 /x^4 = (-1/6)^4+1/(-1/6)^4
= 1+216
= 217
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