anonymous
  • anonymous
What is the 20th term of the arithmetic sequence 2, –4, –10, … ?
Mathematics
jamiebookeater
  • jamiebookeater
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hartnn
  • hartnn
the formula for 'n'th term is a+(n-1)d.....a is first term,d is common difference...,does this help?
anonymous
  • anonymous
the difference is -6. use the formula and 'a' is the first number of the sequence which is 2. help?
anonymous
  • anonymous
this are my choices –130 –124 –118 –112

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anonymous
  • anonymous
anonymous
  • anonymous
do the math, and youll find it.
hartnn
  • hartnn
did u put values in formula?its easy calculation...
anonymous
  • anonymous
idk how to do it thats why i asked.. but thanks.
anonymous
  • anonymous
T(n) = a + (n-1)d .use this formula for T(20)
anonymous
  • anonymous
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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