A sequence is an ordered list of numbers.
A sequence is defined recursively if the first term is given and there is a method of determining the nth term by using the terms that precede it.
A sequence is defined explicitly if terms are determined by their position.
An arithmetic sequence is a sequence in which the difference between each term and the preceding term is a constant.
Recursive form: Un=Un-1+d
Explicit form: Un=U1+ (n-1)d
Parallel Lines have equal slopes.
The product of the slopes of perpendicular lines is -1.
The difference between an actual data value and a predicted data value is called a residual.
The correlation coefficent has the same sign as the slop of the least squares regression line.
A geometric sequence is a sequence in which terms are found by multiplying a preceding term by a nonzero constant r.
From Holt Precalculus: A Graphing Approach
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