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blondinia [14]
2 years ago
6

2x+1=2x-1 please help asap

Mathematics
1 answer:
lbvjy [14]2 years ago
4 0

Answer:

do we have to simplify it ??

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Find the general solution of <img src="https://tex.z-dn.net/?f=2cos%282x%20%2B%20%5Cfrac%7B%5Cpi%20%7D%7B4%7D%20%29%20%3D%20%5Cs
Aleks04 [339]

Answer:

\large\boxed{x=-\dfrac{\pi}{4}+k\pi\ \text{or}\ x=k\pi\ \text{for}\ k\in\mathbb{Z}}

Step-by-step explanation:

2\cos\left(2x+\dfrac{\pi}{4}\right)=\sqrt2\qquad\text{divide both sides by 2}\\\\\cos\left(2x+\dfrac{\pi}{4}\right)=\dfrac{\sqrt2}{2}\to2x+\dfrac{\pi}{4}=\pm\dfrac{\pi}{4}+2k\pi\\\\2x+\dfrac{\pi}{4}=-\dfrac{\pi}{4}+2k\pi\ \vee\ 2x+\dfrac{\pi}{4}=\dfrac{\pi}{4}+2k\pi\qquad\text{subtract}\ \dfrac{\pi}{4}\ \text{from all sides}\\\\2x=-\dfrac{2\pi}{4}+2k\pi\ \vee\ 2x=2k\pi\qquad\text{divide all sides by 2}\\\\x=-\dfrac{\pi}{4}+k\pi\ \vee\ x=k\pi\ \text{for}\ k\in\mathbb{Z}

5 0
3 years ago
In order to answer the following question, please use the following image down below:
Novosadov [1.4K]

Answer:

23

Step-by-step explanation:

(x-3)(9) = (10)(18)

9x - 27 = 180

9x = 207

x = 23

5 0
3 years ago
Collect like terms to simply the expression
viva [34]

Answer:

1=0 2

Step-by-step explanation:

6 0
3 years ago
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Step-by-step explanation:

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3 years ago
Twenty years ago a small town in Texas had a population of 10,000. The population has increased 8% each year since then. What eq
andrezito [222]

Answer:

yea

Step-by-step explanation:

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3 years ago
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