1.

If f(x)=sin^(6) x + cos^(6) xforx in R , then f(x) lies in the interval

Answer»

`[(7)/(8) ,(5)/(4)]`
`[(1)/(2),(5)/(8)]`
`[(1)/(4),1]`
`[(1)/(4),(1)/(2)]`

Answer :3


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