A

Okay, so

i= sqrt -1

then

i^2 = -1

then

i^4 = 1

but if

1=i^4

then

sqrt 1= sqrt (i^4)

sqrt 1= 1

sqrt (i^4) = i^2

so

1=i^2

1=-1

this doesn't make sense...

South Korea and China's relations with each other have been fairly stable as of late and they seem to be a quite friendly with each other. Given what happened to China and Korea in WWII, the two often see eye to eye on matters regarding Japan. Would it not be in the best interest of China then, to drop support to the failing North Koreans? As an olive branch to South Korea, China could drop support to the North Koreans, who are severely dependent on Chinese exports. Then in assisting with the reunification of the two through economic or military means, China won't have to worry about using North Korea as a buffer from South Korea, as this would greatly warm relationships between the two governments. Furthermore, China will now have a powerful ally in the Pacific region.

Can you explain how you arrive at the equation, when, and how do you use the following equations

f'(x)= lim Δx→0 (f(x+Δx)-f(x)) / Δx

f(x) g(x)' = f(x) g'(x) + g(x) f'(x)

(f(x)/g(x))' = (g(x) f'(x) - f(x) g'(x)) / (g(x)^2)

and finally why does

y= sin (3x^3 + 1)

become

(9x^2 + 0)

Thank You in advance. ^_^

P.S. Please show all your work cuz i'm clueless in Calculas :P

All useful answers are much appreciated

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