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If \(\left(\dfrac1{x}+x\right)^2=16,\) then \(\dfrac1{x^2}+x^2=\)
A. 4
B. 8
C. 14
D. 16
E. 18
Answer: C
Source: Magoosh
A. 4
B. 8
C. 14
D. 16
E. 18
Answer: C
Source: Magoosh
