Grade 12Top Engineering Colleges in India
Find the values of a for which the function f (x) = cos x - sin x + ax + b is decreasing
2 Answers
Sher Mohammad
f'(x)=-sinx-cosx+a <0
the minmum value of -sinx-cosx, occurs at pi/4 = -sqrt(2)=-1.41
a-1.41<0
a<1.41
Sher Mohammad
B.Tech, IIT Delhi
Sher Mohammad
'(x)=-sinx-cox+aminimum of -sinx-cosx= -sqrt(2)=-1.4f'(x)>a-1.4f'(x)>0a-1.4>=0a belongs to(1.4, inf)Sher MohammadB.tech, IIT Delhi
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