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Number Sequences and Functions Flashcards

6 cards from real IBEW practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. For the function f(x) = 3x - 7, what is f(5)?

    Answer: 8

    f(5) = 3(5) - 7 = 15 - 7 = 8.

  2. Find the next term in the arithmetic sequence: 11, 17, 23, 29, ___?

    Answer: 35

    Common difference = 6. Next term = 29 + 6 = 35.

  3. If g(x) = x² + 2x - 3, what is g(3)?

    Answer: 12

    g(3) = (3)² + 2(3) - 3 = 9 + 6 - 3 = 12.

  4. What is the 10th term of the arithmetic sequence starting at 4 with a common difference of 7?

    Answer: 67

    a_n = a_1 + (n-1)d = 4 + (10-1)(7) = 4 + 63 = 67.

  5. A geometric sequence has first term 6 and common ratio 3. What is the 4th term?

    Answer: 162

    a_n = a_1 × r^(n-1) = 6 × 3³ = 6 × 27 = 162.

  6. If h(x) = 2x + 5 and h(a) = 19, what is a?

    Answer: 7

    2a + 5 = 19. 2a = 14. a = 7.