App of deriviatives

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Discussion Response Post to: App of deriviatives

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kabi (1665)

Blazing goIITian

total posts: 575
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for first

@ vineet . U r doing a mistake here .

D>0

(2+k)²-8k >0

(k-2)² >0

which is true for every valueof k except when k= 2

a , b option contain k =2 so these are out .

so c, d are the correct option .

second-

differentiate ::

acosx +4cos³x-3cosx = 0

cos(x) [ a +4cos²x -3 ] =0

a + 4 (1/4 ) -3 = 0

a = 2 ,

Max .

three critical points if a =2 , x = pi/3 ,2pi/3 , pi/2

The time u guys take to find the derivative of a function or for finding the equilibrium constant of a reaction or for finding the angle of dispersion of prism or for standing from ur seat to congratulate our team after their win almost in that time one kid die because of poverty.

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