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Urgent! There must be four math problems in high school! Master, please! Wait online! Thank you very much
The maximum value of y = a-bcos 3x (b > 0) is three-thirds, and the minimum value is minus one-half.

There is a-(- 1)*b=3/2.

a-b* 1=- 1/2

Simultaneous a= 1/2 b= 1

y=-4asin(3bx)=-2sin3x

The period is T=2π/3.

The maximum and minimum values are 2 and -2, respectively.

By definition, the function is odd function.