A) \[[d+a,\ d+2a]\]
B) \[[a-d,\ a+d]\]
C) \[[d+a,\ a-d]\]
D) \[[d-a,\ d+a]\]
Correct Answer: D
Solution :
\[f(x)=a\cos (bx+c)+d\] ?..(i) For minimum \[\cos (bx+c)=-1\] from (i), \[f(x)=-a+d=(d-a)\] For maximum \[\cos (bx+c)=1\] from (i), \[f(x)=a+d=(d+a)\] \Range of \[f(x)=[d-a,\,\,d+a]\].You need to login to perform this action.
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