nth term of an arithemetic sequence is 7-3n.What is the common difference of this sequence?. What's is its first team
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first term = 4 and commen difference = - 3
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a+(n-1)d= 7-3n
= 4+3-3n
= 4+(n-1)-3
comparing LHS and RHS
we get a=4 d=-3
= 4+3-3n
= 4+(n-1)-3
comparing LHS and RHS
we get a=4 d=-3
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