SEQUENCES AND SUMMATION

Question 1

A FUNCTION is a SEQUENCE from the set N = {1, 2, 3, …} of positive integers into a set A.

Answer 1

False, A SEQUENCE is a FUNCTION

Question 2

A GEOMETRIC PROGRESSION is a sequence of the form a, ar, ar^2, … , ar^n

An ARITHMETIC PROGRESSION is a sequence of the form a, a+d, a + 2d, …, a + nd

Answer 2

True

Question 3

Summation is introduced with the delta symbol (δ)

Answer 3

False, summation symbol (Greek letter sigma) (Σ)

Question 4

n
∑
j=1

The letter j in the above expressions is called a REAL index or READ variable.

Answer 4

False, DUMMY index or DUMMY variable