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raytiller1 Group Title

What is the 20th term of the arithmetic sequence 2, –4, –10, … ?

  • 2 years ago
  • 2 years ago

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  1. hartnn Group Title
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    the formula for 'n'th term is a+(n-1)d.....a is first term,d is common difference...,does this help?

    • 2 years ago
  2. mathsloser56 Group Title
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    the difference is -6. use the formula and 'a' is the first number of the sequence which is 2. help?

    • 2 years ago
  3. raytiller1 Group Title
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    this are my choices –130 –124 –118 –112

    • 2 years ago
  4. raytiller1 Group Title
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    @hartnn @mathsloser56

    • 2 years ago
  5. mathsloser56 Group Title
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    do the math, and youll find it.

    • 2 years ago
  6. hartnn Group Title
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    did u put values in formula?its easy calculation...

    • 2 years ago
  7. raytiller1 Group Title
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    idk how to do it thats why i asked.. but thanks.

    • 2 years ago
  8. mathsloser56 Group Title
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    T(n) = a + (n-1)d .use this formula for T(20)

    • 2 years ago
  9. mathsloser56 Group Title
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    a is the first number, 2 n is the \[n^{th}\] you want, which is 20 d is the common difference between the numbers, which is -6

    • 2 years ago
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