Question 193594
Please help..the question is use and arithmetic sequence to find how many multiples of seven are between 11 and 391? ive tried setting it up as a1=11 and and a sub n = 391, but i dont know what what to do after that.
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14 is the 1st
14 + 7 is the 2nd
14 + 2*7 is the 3rd
...
14 + 53*7 is the 52 and last
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Cheers,
Stan H>