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raytiller1

  • 3 years ago

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

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

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

  4. raytiller1
    • 3 years ago
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    @hartnn @mathsloser56

  5. mathsloser56
    • 3 years ago
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    do the math, and youll find it.

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

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

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

  9. mathsloser56
    • 3 years ago
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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

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