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Question Number 189643 by 073 last updated on 19/Mar/23

$$\mathrm{f}\left(\mathrm{x}\right)=\frac{\mathrm{sinx}+\mathrm{cosx}}{3}$$$${\mathrm{R}}_{\mathrm{f}\left(\mathrm{x}\right)}=?$$

Answered by mehdee42 last updated on 19/Mar/23

$$f\left(x\right)=\frac{\sqrt{2}}{3}Sin(x+\frac{\pi }{4})\Rightarrow R_f=[-\frac{\sqrt{2}}{3},\frac{\sqrt{2}}{3}]$$

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