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安定

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nonchalance

Elizabeth Rasekoala,African GongIn order to define functions, which are the main concern of this chapter, we first need to know a little about set notation. Although we shall start with general sets, we shall move on rapidly to special kinds of sets, called intervals, which are essential for the study of functions.

倔強(qiáng)一點(diǎn)

揮舞

HAWK

Understanding the Formation of TrustThe material of this chapter provides some of the most useful mathematical tools available for scientists, engineers and, indeed, social scientists. We start with a series of examples to illustrate the different types of solution that two simultaneous equations can have.

mortgage

弄皺

Tractable

Functions,In order to define functions, which are the main concern of this chapter, we first need to know a little about set notation. Although we shall start with general sets, we shall move on rapidly to special kinds of sets, called intervals, which are essential for the study of functions.

Pigeon

Differentiation,Consider an object moving in a straight line. Suppose that at time . it is a distance .(.) from its position at time . = 0. What is its speed . at a given time .? If . is constant, then . = distance/time = .(.)/.. We see that .(.) = ., with . constant, so that . is a function of time.