Thursday

August 28, 2014

August 28, 2014

Posted by **erika** on Tuesday, September 20, 2011 at 9:16pm.

- math -
**Steve**, Wednesday, September 21, 2011 at 11:51amRecall that sqrt(x) = x^(1/2), so the slope of the graph at any point x is 1/(2*sqrt(x)).

So, at point P, x=a, slope is 1/(2*sqrt(a)).

So, the line is y=2x + b, meaning that the slope is 2. That means that 2 = 1/(2*sqrt(a)). So, a=1/16.

P = (1/16, 1/4)

y=2x+b

1/4 = 2(1/16)+b

1/4 = 1/8 + b

1/8 = b

y = 2x + 1/8

**Related Questions**

math-Inverse functions - f(x)=-4x-2 & g(x)=5x-6. Find (f*g) and state domain. f(...

Math - point on the graph (check +help) - Determine the coordinates of the point...

calculus - Find the equation of the line tangent to the graph of the given ...

Math - point on the graph - Determine the coordinates of the point on the graph ...

MATH - I need to simply this equation, but I got stuck. h/(4-sqrt(16+h)) = y ...

Math - Use linear approximation, i.e. the tangent line, to approximate sqrt[3...

maths - let f(x,y)=sqrt (1-x^2-y^2) where x^2+y^2 <1. (positive sqrt) a.) ...

Math Help please!! - Could someone show me how to solve these problems step by ...

math,algebra,help - Directions are simplify by combining like terms. x radiacal ...

Math - How do you find a square root of a number that's not a perfect square? I'...