minecraftknowsall
minecraftknowsall minecraftknowsall
  • 16-12-2021
  • Mathematics
contestada

Find the x-coordinates where f '(x) = 0 for f(x) = 2x – sin(2x) in the interval [0, 2π].

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evgeniylevi
evgeniylevi evgeniylevi
  • 16-12-2021

Answer:

0; π and 2π.

Step-by-step explanation:

1) if f(x)=2x-sin2x, then f'(x)=2-2cos2x;

2) if f'(x)=0, then 2-2cos2x=0,

cos2x=1; ⇒ x=πn, n∈Z;

3) if the given interval is [0;2π] and x=πn (n∈Z), then x=0; π; 2π.

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