Find the integer ^@ x ^@ that satisfies the equation ^@ x^5 - 101 x^3 - 999 x^{ 2 } + 100900 = 0 ^@.
Answer:
^@ 10 ^@
- We need to find the integer value of ^@ x ^@ that satisfies the equation ^@ x^5 - 101 x^3 - 999 x^{ 2 } + 100900 = 0. ^@
- ^@\begin{align} & x^5 - 101 x^3 - 999 x^{ 2 } + 100900 = 0 \\ \implies & x^5 - 101 x^3 - 999 x^{ 2 } + 100899 + 1 = 0 \\ \implies & x^3(x^{ 2 } - 101) - 999(x^{ 2 } - 101) + 1 = 0 \\ \implies & (x^{ 2 } - 101)(x^3 - 999) + 1 = 0 && \ldots (1) \\ \end{align}^@
- We observe that the only integer that satisfies ^@ (1) ^@ is ^@ 10. ^@
Hence, the value of ^@ x ^@ is ^@ 10. ^@