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=x-1=0
x=1
=Now substituting this value of x÷
=3x^4-4x^3-3x-1
=3(1)^4-4(1)^3-3(1)-1
= 3-4-3-1
= -5
x=1
=Now substituting this value of x÷
=3x^4-4x^3-3x-1
=3(1)^4-4(1)^3-3(1)-1
= 3-4-3-1
= -5
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