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Over [174]
3 years ago
10

Find the next term in this arithmuc sequence

Mathematics
1 answer:
zvonat [6]3 years ago
6 0
Hey there :)

\frac{7}{2},  \frac{9}{4},1, -\frac{1}{4} , -\frac{3}{2} ,  \frac{?}{?}

We can find the common difference here as it is an arithmetic sequence.

The common difference between each term is: \frac{5}{4}

\frac{7}{2} - \frac{5}{4} = \frac{9}{4}

We can find the unknown term by:
-\frac{3}{2}- \frac{5}{4}= -\frac{11}{4} {easier way in this example}

OR

by the formula for finding the nth term

a₆ = \frac{7}{2} +(6-1)( -\frac{5}{4} ) 
{a₆ because it is the 6th term to be found, (6-1) the nth term minus 1}

a₆ = - \frac{11}{4}
However this way is not essential here as the previous term is given. 

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