Mathematics

Mathematics

Problem

A curve satisfies dydx=x+y\dfrac{dy}{dx}=x+y and passes through (0,1)(0,1). Using equal horizontal steps of length 0.50.5, which value is the best Euler estimate of y(1)y(1)? a) 3.03.0 b) 2.52.5 c) 2.02.0 d) 2.252.25
Intuitive explanation

Euler's method builds an approximate solution by taking small steps along the slope at each point. Starting from your known point (0,1)(0,1), you'll use the differential equation dydx=x+y\frac{dy}{dx}=x+y to find the slope, then move horizontally by 0.50.5 and vertically by (slope) ×0.5\times 0.5. Repeat this process twice to reach x=1x=1, tracking how yy changes at each step.

Intuitive explanation

Euler's method builds an approximate solution by taking small steps along the slope at each point. Starting from your known point (0,1)(0,1), you'll use the differential equation dydx=x+y\frac{dy}{dx}=x+y to find the slope, then move horizontally by 0.50.5 and vertically by (slope) ×0.5\times 0.5. Repeat this process twice to reach x=1x=1, tracking how yy changes at each step.

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