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Home > CCA2 > Chapter 6 > Lesson 6.2.2 > Problem 6-122

6-122.

Eniki has a sequence of numbers given by the formula t(n) = 4(5n). Homework Help ✎

  1. What are the first three terms of Eniki's sequence?

    Substitute n = 1, 2, and 3 into the formula.

  2. Chelita thinks the number 312,500 is a term in Eniki's sequence. Is she correct? Justify your answer by either giving the term number or explaining why it is not in the sequence.

    Let t(n) = 312,500 and solve for n. Be sure to divide both sides of the equation by 4 before taking the log of both sides.

    What kinds of numbers will tell you if it is in the sequence?

  3. Elisa thinks the number 94,500 is a term in Eniki's sequence. Is she correct? Explain.

    See part (b).