1.

If \({x^2}\; + \;\frac{1}{{25{x^2}}}\; = \;\frac{8}{5}\) and x > 0, then what is the value of \({x^3}\; + \;\frac{1}{{125{x^3}}}?\)

A. 7√2
B. 5√2
C. (7√2)/5
D. 7√6
Answer» D. 7√6


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