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[spec] start differential equations & verifying solutions
author
Andrew Lorimer
<andrew@lorimer.id.au>
Wed, 15 May 2019 04:06:32 +0000
(14:06 +1000)
committer
Andrew Lorimer
<andrew@lorimer.id.au>
Wed, 15 May 2019 04:06:32 +0000
(14:06 +1000)
spec/calculus.md
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b/spec/calculus.md
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spec/calculus.md
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spec/calculus.md
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-384,3
+384,15
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If $f$ is continuous on $[a, b]$, then
$$\int^b_a f(x) \> dx = F(b) - F(a)$$
where $F$ is any antiderivative of $f$
$$\int^b_a f(x) \> dx = F(b) - F(a)$$
where $F$ is any antiderivative of $f$
+
+## Differential equations
+
+One or more derivatives
+
+**Order** - highest power inside derivative
+**Degree** - highest power of highest derivative
+e.g. ${\left(dy^2 \over d^2 x\right)}^3$: order 2, degree 3
+
+### Verifying solutions
+
+Start with $y=\dots$, and differentiate. Substitute into original equation.