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4-2.Quadratic Equations and Inequations
hard
સમીકરણ ${2^{\left( {x - 1} \right)\left( {{x^2} + 5x - 50} \right)}} = 1$ ના બધા વાસ્તવિક ઉકેલોનો સરવાળો ......... થાય.
A
$16$
B
$14$
C
$-4$
D
$-5$
(JEE MAIN-2017)
Solution
$(x – l)(x^2 +5x -50)\, =0$ $ \Rightarrow $ $(x – l)(x + 10) (x -5)\,=0$ $ \Rightarrow $ $x\, = 1, 5, -10$ sum $= -4$
Standard 11
Mathematics
