MCQ
$x^{7}+5 x^{3}+3 x+1=$ $0$ના વાસ્તવિક ઉકેલોની સંખ્યા.............. છે
- A$0$
- ✓$1$
- C$3$
- D$5$
$f^{\prime}(x)=7 x^{6}+15 x^{2}+3>0$
$\therefore f ( x )$ is strictly increasing function
$x \rightarrow-\infty, y \rightarrow-\infty$
$x \rightarrow \infty, y \rightarrow \infty$
$\therefore$ no. of real solution $=1$
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