Question

if the 25th term of an arithametic sequence is 180 and the common difference is 7,then what is its first term​

Answer 1

Answer:

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Answer 2

Answer:

n=25,an=180,d=7

an =a+(n-1)d

180=a+(25-1)7

180=a+(24)7

180=a+168

a=180-168

a=12 answer