if $$x^4+{16\over x^4}=15617, x>0$$ then find the value of $$x+{2\over x}$$
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Q:
if $$x^4+{16\over x^4}=15617, x>0$$ then find the value of $$x+{2\over x}$$
- 1$$ \sqrt {121} $$false
- 2$$ \sqrt {127} $$false
- 3$$ \sqrt {129} $$true
- 4$$ \sqrt {123} $$false
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