write 4 athematic sequences with 105 as the sum of the 1st seven terms - Maths - Arithemetic Sequences

Question

write 4 athematic sequences with 105 as the sum of the 1st seven
terms

Rishabh Mittal · Accepted Answer

Dear Student ,

Please find below the solution to the asked query :

We know ,sn=n22a+n-1dHere s7=105 Let a=5 105=7210+7-1d30=10+6d6d=20d=206=3
33So , AP is 5 , 8 33 , 11
66 , 14 99 
Similarly for different values of a , you can find more arithmetic sequences 
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write 4 athematic sequences with 105 as the sum of the 1st seven terms.