# Help with calculus multiple choice?

Would appreciate answer and working out, thank you

### 2 Answers

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- PinkgreenLv 77 months ago
Ans. A

Explanation:

y=f(x)

=>

y'=f '(x)=-1/(2x)

[the slope of a curve at

(x,y) is the -ve reciprocal

of that of its normal at the

same point].

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- 7 months ago
The normal to the curve will be the negative inverse of the tangent to the curve

(dy/dx) * (2x) = -1

dy/dx = -1/(2x)

y = (-1/2) * ln|x| + C

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