4-2.Quadratic Equations and Inequations
hard

ધારોકે $\lambda \in R$ અને ધારોકે સમીકરણ $E$ એ $|x|^2-2|x|+|\lambda-3|=0$ છે. તો ગણ $S =\{x+\lambda: x$ એ $E$ નો પૂર્ણાંક ઉકેલ છે; નો મહતમ ધટક $.............$ છે.

A

$4$

B

$3$

C

$5$

D

$2$

(JEE MAIN-2023)

Solution

$| x |^2-2| x |+|\lambda-3|=0$

$| x |^2-2| x |+|\lambda-3|-1=0$

$(| x |-1)^2+|\lambda-3|=1$

At $\lambda=3, x =0$ and 2 ,

at $\lambda=4$ or 2 , then

$x =1 \text { or }-1$

So maximum value of $x+\lambda=5$

Standard 11
Mathematics

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