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4-2.Quadratic Equations and Inequations
normal
સમીકરણ $(\frac{3}{2})^x = -x^2 + 5x-10$ ના વાસ્તવિક ઉકેલોની સંખ્યા .......... છે
A
$1$
B
$2$
C
$4$
D
$0$
Solution
Let $f(x)=-x^{2}+5 x-10$ and $g(x)=\left(\frac{3}{2}\right)^{x}$
$f(x)_{\max }=\frac{-D}{4 a}=\frac{-15}{4}$ and $g(x)>0$
so $f(x)=g(x)$ has no Real solutions
Standard 11
Mathematics