Question

The sum of the first 10 terms of an arithmetic sequence is 350 and the sum of the first 5 terms is 100 write the algebraic expression for the sequence

Answer 1

let the number in the sequence x
x+(x+2)+(x+2)+(x+3)+(x+4)=100

after one one number one number increases like 1,1+1=2,1+2=3

1x+(x+2)+(x+3)+(x+4)+(x+5)+(x+6)+(x+7)+(x+8)+(x+9)+(x+10)=100

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