Algebra Basics Quiz

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Questions and Answers

What is the common difference in an arithmetic sequence?

  • The fixed amount added to each term (correct)
  • The number of terms in the sequence
  • The first term of the sequence
  • The last term of the sequence

Which of the following correctly defines a geometric sequence?

  • A sequence found by multiplying the previous terms by a fixed number (correct)
  • A sequence where each term is the sum of the previous two terms
  • A sequence generated by adding a common difference to each term
  • A sequence where terms form an arithmetic sequence in reverse

In the Fibonacci sequence, what is the next term after 5?

  • 11
  • 10
  • 8 (correct)
  • 7

What is the formula for finding the nth term of a geometric sequence?

<p>A(n) = A(1)R^(n-1) (C)</p> Signup and view all the answers

In division, what does the term 'remainder' refer to?

<p>The amount left after dividing (C)</p> Signup and view all the answers

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Study Notes

Terminology in Algebra

  • Coefficient: A number placed in front of a variable or term indicating how many times the variable is multiplied.
  • Variable: A letter representing a number that can change or vary within an expression.
  • Constant: A fixed numerical value that does not change, devoid of any variables.
  • Expression: A mathematical phrase that includes numbers, variables, operators, and constants.
  • Operator: The symbols denoting mathematical operations, such as addition, subtraction, multiplication, and division.
  • Sequence: An ordered list of numbers or terms, following a specific rule.
  • Terms: Individual elements or components within a sequence.

Sequences in Mathematics

  • Arithmetic Sequence: A sequence generated by adding a common difference to the previous term, resulting in equal differences between consecutive terms.
  • Formula for Arithmetic Sequence: ( A(n) = A(1) + (n - 1) d ), where:
    • ( A(n) ) = the nth term
    • ( A(1) ) = the first term
    • ( n ) = the term position
    • ( d ) = common difference.
  • Common Difference: The fixed amount added to each term in an arithmetic sequence to reach the next term.

Geometric Sequences

  • Geometric Sequence: A sequence where each term is found by multiplying the previous term by a constant non-zero multiplier.
  • Formula for Geometric Sequence: ( A(n) = A(1) R^{(n-1)} ), with:
    • ( A(n) ) = the nth term
    • ( A(1) ) = the first term
    • ( R ) = common ratio (the fixed multiplier).

Special Sequences

  • Fibonacci Sequence: A series where each term is the sum of the two preceding numbers, beginning with 0 and 1.
    • Example progression: 0, 1, 1, 2, 3, 5, 8, 13, ...
  • Harmonic Sequence: A sequence where the reciprocals (1/n) of its terms form an arithmetic sequence.
    • Example: 1/2, 1/4, 1/6, 1/8, 1/10, ...

Division Terminology

  • Quotient: The result obtained from dividing one number by another.
  • Divisor: The number that divides the dividend in a division operation.
  • Dividend: The number being divided, often represented within a division symbol.
  • Remainder: The amount left over if division does not result in a whole number.
  • Ratio: A comparison between two quantities, commonly expressed in the form of a fraction.

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