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Find a common difference of the arithmetic sequence -2, -1 4/5, -1 3/5, -1 2/5,

User Nicq
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1 Answer

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Answer:

The common difference is
(1)/(5) or 0.2

Explanation:

Given:

Arithmetic Sequence -2, -1 4/5, -1 3/5, -1 2/5,

First term = a₁ = -2

Second term = a₂ =
(-9)/(5)

Third term = a₃ =
(-8)/(5)

Fourth term = a₄ =
(-7)/(5)

To Find:

Common Difference = d = ?

Solution:

Formula for Common Difference d ,
\textrm{common difference}= \textrm{Second Term} -\textrm{First Term}=\textrm{Third Term}-\textrm{Second Term}


\textrm{common difference} = a_(2)- a_(1)= a_(3)- a_(2)=a_(4)- a_(3)


d = (-9)/(5)-(-2)\\d=(-9)/(5)+2\\d=(1)/(5)\\ \therefore d =0.2\\

The common difference is
(1)/(5) or 0.2

User Anton Belousov
by
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