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Kipish [7]
3 years ago
11

I need help on A,B,C on this brainest if help

Mathematics
2 answers:
Anni [7]3 years ago
8 0

Answer:

its d

Step-by-step explanation:

jolli1 [7]3 years ago
7 0
The answer is ddddddddddd
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Y=arccos(1/x)<br><br> Please help me do them all! I don’t know derivatives :(
Stells [14]

Answer:

f(x) =  {sec}^{ - 1} x \\ let \: y = {sec}^{ - 1} x  \rightarrow \: x = sec \: y\\  \frac{dx}{dx}  =  \frac{d(sec \: y)}{dx}  \\ 1 = \frac{d(sec \: y)}{dx} \times  \frac{dy}{dy}  \\ 1 = \frac{d(sec \: y)}{dy} \times  \frac{dy}{dx}  \\1 = tan \: y.sec \: y. \frac{dy}{dx}  \\ \frac{dy}{dx} =  \frac{1}{tan \: y.sec \: y}  \\ \frac{dy}{dx} =  \frac{1}{ \sqrt{( {sec}^{2}   \: y - 1}) .sec \: y}  \\ \frac{dy}{dx} =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} } \\   \therefore  \frac{d( {sec}^{ - 1}x) }{dx}  =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} } \\ \frac{d( {sec}^{ - 1}5x) }{dx}  =  \frac{1}{ |5x |  \sqrt{25 {x }^{2}  - 1} }\\\\y=arccos(\frac{1}{x})\Rightarrow cosy=\frac{1}{x}\\x=secy\Rightarrow y=arcsecx\\\therefore \frac{d( {sec}^{ - 1}x) }{dx}  =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} }

4 0
3 years ago
What is the volume of a spear that has a diameter of 42 cm.
mash [69]
R-the\ radius\ of\ the\ sphere\\\\the\ volume\ of\ the\ sphere:V=\frac{4}{3}\pi R^3\\the\ diameter=2R\ therefore\ R=42:2=21\ (cm)\\\\V=\frac{4}{3}\pi\cdot21^3=\frac{4}{3}\pi\cdot9,261=4\cdot3,087\pi=12,348\pi\\\\=12,348\cdot3.14\approx\boxed{38,772.72\ (cm^3)}
3 0
4 years ago
Write the formula for an exponential function with initial value 300 and decay factor 0.73
postnew [5]

Answer: 300*0.73^x

Step-by-step explanation:

300 is the initial value and every time x goes up by 1, the value get multiplied by 0.73

when x=3

then the value would be 300*0.73*0.73*0.73 or 300*0.73^3

then for x amount of times the equation would be 300*(0.73 x times ) or 300*0.73^x

8 0
3 years ago
(09.05)
saw5 [17]

Answer:

a.

Step-by-step explanation:

f(x) has the highest or greatest maximum y value of 3

3 0
3 years ago
Which graph shows the line y-1=2(x+2)
Yanka [14]
Graph C. The equation of the line is y=2x+5. 5 is the y-intercept so the line has to go through that point.
3 0
3 years ago
Read 2 more answers
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