Posted by **elle** on Sunday, May 20, 2007 at 7:10am.

hi, i'd really appreciate some help solving this question! I am completely at loss here :/ The question is to:

Find the equation of the normal to y=loge(x+2) which is parallel to the line with equation y+3x-5=0

I am fine at solving these sorts of equations when they give me one equation and an provide a given x value but in this question i have no idea what i am meant to be doing... Please help!!

Put the second equation in slope intercept form

y=-3x +5 slope is -3

So what is the slope of the tangent to

y=ln(x+2)

slope= 1/(x+2)

so the inverse negative slope will be

- (x+2), this has to equal -3x

set them equal, and you have the x where it occurs.

Put that x into the log equation, and find y.

y=mx +b

You have y, m, x, solve for b.

## Answer This Question

## Related Questions

- Maths (Tangents and Normals) - find the points on the curve [(x^2 )+ (y^2) = 18...
- Algebra - I really need your help in solving this problem. I appreciate your ...
- Calculus - determine the equation of a plane, P3, that intersects the planes P1...
- Calculus - Find the normals to the curve xy + 2x - y = 0 that are parallel to ...
- Calculus - Find the normals to the curve xy + 2x - y = 0 that are parallel to ...
- Calculus - Maths - I got a few questions. Hope ya'll can help out. 1) for F(X...
- Calculus - Find normals to the curve xy+2x-y=0 that are parallel to the line 2x+...
- vectors - 3 planes; $: x+2y-2z-6=0 %: 2x-y+z+8=0 £: 2x-y+2z+3=0 (a)(i)Find the ...
- Vectors - 3 planes; $: x+2y-2z-6=0 %: 2x-y+z+8=0 £: 2x-y+2z+3=0 (a)(i)Find the ...
- Maths (Tangents and Normals) - curve y = (x^2) - 4x + 5 is tangent perpendiculat...

More Related Questions