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Calculus

Limits, derivatives, integrals, series and optimisation.

Isomo

Introductory Limits Substitution, factoring and L'Hôpital's rule. limit of sin(x)/x as x -> 0 Core Derivatives Power, product, quotient and chain rules, applied one at a time. derivative of sin(x)*x^2 Core Integrals Antiderivatives by substitution, parts and partial fractions. integral of x*e^x dx Core Definite integrals Area under a curve and the fundamental theorem of calculus. integrate x^2 dx from 0 to 1 Advanced Taylor series Approximating a function by polynomials built from its derivatives. taylor series of e^x Advanced Series and sums Partial sums, closed forms and convergence. sum of 1/n^2 for n = 1 to oo Core Maxima and minima Critical points and the second-derivative test. critical points of x^3 - 3x Core The chain rule Differentiating a function of a function: outside derivative times inside derivative. derivative of sin(x^2) Core Implicit differentiation Differentiating relations that are not solved for y. derivative of x^2 + y^2 wrt x Core Related rates and optimisation Turning a word problem into a derivative: what is changing, what is fixed, what is extreme. maximum of -x^2 + 4x Core Integration techniques: substitution, parts, partial fractions Recognising which technique an integrand wants. integral of 2x/(x^2+1) Core Applications of integration: area, volume, arc length Areas between curves, solids of revolution, average value. integrate pi*(sqrt(x))^2 dx from 0 to 4 Core Infinite series and convergence tests Geometric, p-series, ratio and comparison tests, alternating series. does n/2^n for n = 1 to oo converge

The mathematics of change. Derivatives here are taken one rule at a time (power, product, chain…), integrals show the technique they use (substitution, parts, partial fractions), and every result is graphed against the original.

Birenzeho

Bya Kuva: Gufungura Umwandiko: Boelkins, Active Calculus, OpenStax Calculus Volume 1, OpenStax Calculus Volume 2, OpenStax Precalculus 2e, Wikipedia. Each lesson page names its source and licence.

Byakoreshejwe

Icyo ari cyo cyose Ibimenyetso ya: i Byuzuye Insobanuro:, A Ishusho, na buri Ibaruwa: in.

Abaturage

What is a derivative in one sentence?

The slope of the graph at a point, the rate at which the output is changing there. Speed is the derivative of position.

What is an integral in one sentence?

The accumulated total of a rate: the area under the curve. Distance travelled is the integral of speed.

Why are derivatives and integrals opposites?

That is the fundamental theorem of calculus: accumulating a rate and then measuring how fast the accumulation grows gets you back the rate. Integration undoes differentiation up to a constant.

When do I use substitution and when integration by parts?

Substitution when part of the integrand is the derivative of another part (u and du both present). Parts when the integrand is a product of two unrelated kinds of function, a polynomial times an exponential, log or trig function.

A Bya?
Cyangwa Gushushanya ku i Ipaji:: Intera, A Ishusho, i Gihishwe & Kugeza & Kubaza.
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