NatalieLove
What is the sum of the arithmetic sequence 8, 15, 22 …, if there are 26 terms?
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Siddharth18
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well first find the common difference
kantalope
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n+7
Siddharth18
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subtract any consequetive terms.that gives you the common difference
Siddharth18
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for example if a,b and c are in arithmetic progression then common difference is
b-a which also equals c-a
now tell what's the cd for the given sequence?
Siddharth18
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r u there?
NatalieLove
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yes
NatalieLove
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i dont get it
Siddharth18
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do you know what common difference in an arithmetic progression means?
NatalieLove
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no
NatalieLove
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ok
Siddharth18
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can you it solve yourself now?
NatalieLove
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not really
NatalieLove
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im gonna guess it
Siddharth18
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you attemptin sum kinda test?