If x4 + x-4 = 1442, (x > 0) then the value of x - x-1 is: – McqOptions

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1.	If x4 + x-4 = 1442, (x > 0) then the value of x - x-1 is:
A.	15
B.	6
C.	7
D.	8
Answer» C. 7

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