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Exercises
Question 1
The first term of an arithmetic sequence is 4 and the tenth term is 67.
What is the common difference?
Question 2
What is the thirty-second term of the arithmetic sequence -12, -7, -2, 3, ... ?
Question 3
What is the fiftieth term of the arithmetic sequence 3, 7, 11, 15, ... ?
Exercises
Question 1
How many permutations of 3 different digits are there, chosen from the ten digits 0 to 9 inclusive?
Question 2
How many permutations of 4 different letters are there, chosen from the twenty six letters of the alphabet?
Question 3
How many different committees of 5 people can be chosen from 10 people?
What's the Difference?
I’ve always confused “permutation” and “combination” — which one’s which?
Exercises
Question 1
Solve 5x > 10
Question 2
Solve 3x + 2 > 8
Question 3
Solve the inequality 3x - 7 < 5
Basic Rules of Inequalities
Introduction to Logarithms
Introduction
Indices are a useful way of more simply expressing large numbers. They
also present us with many useful properties for manipulating them using
what are called the Law of Indices.