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Michael Samuel
Answers (1)
1st term=7 2nd term=a+d 10term=a+9d 7+9d=2(14+2d) 14-7=9d-2d 7=7d=d=1 sum of 28 term n/2(2a+(n-1)d) 28/2(2*7+(28-1)1) 14(14+27)=14(41) 25term=574 9th term=7+(9-1)1 7+(9-1) 7+8=15 6th term=7+(6-1)1 7+(6-1)=7+5=12 9th term-6th term=15-12=3.
