Precalculus Review Units 4-6

Front

What is the common ratio in a geometric sequence?

Back

The common ratio is the factor by which each term in a geometric sequence is multiplied to get the next term.

Front

Find the common ratio of the geometric sequence 6, 42, 294.

Back

7

Front

What is a direction angle of a vector?

Back

A direction angle is the angle formed between the vector and the positive x-axis.

Front

Find the direction angle for the vector <2, 7>.

Back

74.05°

Front

What are conic sections?

Back

Conic sections are the curves obtained by intersecting a cone with a plane.

Front

Classify the conic: y = x^2.

Back

Parabola

Front

Classify the conic: x^2 + y^2 = r^2.

Back

Circle

Front

Classify the conic: x^2/a^2 - y^2/b^2 = 1.

Back

Hyperbola

Front

Classify the conic: x^2/a^2 + y^2/b^2 = 1.

Back

Ellipse

Front

What is an explicit rule for a sequence?

Back

An explicit rule defines the nth term of a sequence as a function of n.