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i have a question which is the attachment pless send me the replyy as soon as possiable 44

i have a question which is the attachment pless send me the replyy as soon as possiable  44

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Grade:12

1 Answers

yog
19 Points
6 years ago
f(x) is incresing means derivative of f is greater than 0
cos is even function 
so cos|x|=cosx
f(x) = cosx -2ax+b
f’(x)= -sinx -2a >0 
2a+sinx
maximum of (2a+ sinx) is 2a+1 as max value of sinx is 1
thus if 2a+1
thus 2a
a

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