Posted by **nic** on Saturday, February 26, 2011 at 11:31pm.

please help. Compute Δy and dy for x = 4 and dx = Δx = -0.2. (Round the answers to three decimal places.)

y = 4x - x2....im lost to were to start solving for delta y

- calculus -
**Spider Man**, Thursday, March 17, 2011 at 9:56pm
To compute for dy, you use the equation dy=f'(a)*dx where f'(a) is the derivative of the function given.

So dy=(4-2x)*dx Plug in the values

dy=(4-2(4))*(-.2)=? SOLVE

To find Δ y, you use the equation

Δy=f(x-Δx)-f(x) Plug in the values

Δy=(4(4.2)-(4.2)^2)-(4(4)-4^2)=? SOLVE

## Answer this Question

## Related Questions

- Calculus Help Please!!! - Compute Δy and dy for the given values of x and ...
- Math - Sorry! I don't get this one either.. limit of (f(x+Δx)-f(x)) / Δ...
- calculus - Let x = 1 and Δx = 0.01. Find Δy. (Round your answer to ...
- math 160(buss calculus) - my homework is due in 1 hour Let x = 1 and Δx = 0...
- chemistry - # Which of the following is true for the reaction NH3(l) NH3(g) at –...
- chemistry - Suppose the ΔGof, ΔHof, and ΔSo are available and ...
- Calculus - Use the Linear Approximation to estimate ∆f=f(3.5)−f(3) ...
- Chemistry - How do i calculate: What is is ΔG° at 25 °C? 2O3(g) → 3 ...
- Chemistry - How would you exactly start the first problem? My thermodynamic ...
- Calculus - Let f be the function defined as follows. $ y = f(x) = \sqrt{{\color{...