Examples of Math Problems: The tenth term of an arithmetic sequence is 42 more than the seventh term.If the first term is -14.Find the second term of the sequence?

Sunday, January 4, 2015

The tenth term of an arithmetic sequence is 42 more than the seventh term.If the first term is -14.Find the second term of the sequence?

a%5B10%5D=a%5B7%5D%2B42

a%5B1%5D=-14

%0D%0Ad=%28a%5Bn%5D-a%5Bm%5D%29%2F%28n-m%29%0D%0A

%0D%0Ad=%28a%5B10%5D-a%5B7%5D%29%2F%287-3%29%0D%0A

%0D%0Ad=%28a%5B7%5D%2B42-a%5B7%5D%29%2F%287-3%29=14%0D%0A

Now

a%5B2%5D=a%5B1%5D%2Bd=-14%2B14=0

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