vivekjain0908
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Confused on how to approach this q.
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Confused on how to approach this q.
Perhaps the following would be useful in terms of part (i) and part (ii):
Differentiate both sides of the equation:
=\frac{d}{dx}\left(9\right))
Differentiate the left side of the equation:
Since 9 is a constant with respect to 𝑥, the derivative of 9 with respect to 𝑥 is 0.
Reform the equation by setting the left side equal to the right side:
Solve for
Replace with 
I hope this helps!
Differentiate both sides of the equation:
Differentiate the left side of the equation:
Since 9 is a constant with respect to 𝑥, the derivative of 9 with respect to 𝑥 is 0.
Reform the equation by setting the left side equal to the right side:
Solve for
Replace
I hope this helps!
chilli 412
oo la la
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for part (iii), think about at what point on the circle will the tangent line be undefined (a vertical line as the slope)
recall that for eq of circles, x^2 + y^2 = r^2
so we know that -3 and 3 are the radius of the circle on the x axis
the slope at these points would be a vertical line, hence undefined
recall that for eq of circles, x^2 + y^2 = r^2
so we know that -3 and 3 are the radius of the circle on the x axis
the slope at these points would be a vertical line, hence undefined
