...; Jo — ~ = ^Ô~ = • Hence the series is 100, !)ti, 92, 88, &c. Ex. 5. The яш of an arithmetic series is 1455, the first term 5, and the number of terms 30. What is the common difference? Here S— 14:15,ч _ ,_2S—2an U=J} Г _2910-300_2610 ra=30; J - УОО-30 ~"870~ . Hence the series...

...I, 1, 2, -I, &c. ? Ans. 3775. 3 3 3 3 3 4. If the sum of an arithmetical series is 1 455, the least term 5, and the. number of terms 30 ; what is the common difference ? Ans. 3. 5. If the sum of an arithmetical series is 567, the first term 7, and the common difference 2 ; what...

...4000 B = 20. = ____ -—=100. Hence the series is 100, 96, 92, 88, &c. Ex.5. The sum of an arithmetic series is 1455, the first term 5, and the number of terms 30. What is the common difference ? Here 5= 1455, ^ . 7 25— 2aw a = 5, 7* — n _2910 — 300_ 261^0 _3 900 — 30 "~ 870 ~ n=30; Hence...

...40 Hence the series is loo, 96, 92, 88, &c. Ex.5. The sum of an arithmetic series is 1455, theßrst term 5, and the number of terms 30. What is the common difference ? Here S= 1455, , n'—n ' i _2910-300^2610_ n = 30; ^ 900 — 30 870 ~ " Hence the series is 5, 8,...

...common difference = — 6, and the sum = 5 ; determine the number of terms. 15. The sum of an arithmetic series is = 1455, the first term = 5, and the number of terms = so ; determine the common difference. 16. If о be the first term, b the second, I the last term...

...(»— 1)2] = I4n+2«a— 2n <f=2; ) =1134; .-. n2+6n+tf=576, and n=2l. Ex. 3. The sum of an arithmetic series is 1455, the first term 5, and the number of...terms 30. What is the common difference.' Ans. 3. Ex. 4. The sum of an arithmetic series is 1240, common difference-^, and number of terms 20. What is...

...4S9).2s=rt[2a* = 5G7, i .-.( ffl = 7, \ »[1 rf=2; ) = :|134; n=2l. Ex. 3. The sum of an arithmetic series is 1455, the first term 5, and the number of...terms 30. What is the common difference ? Ans. 3. Ex. 4. The sum of an arithmetic series is 1240, common difference-^, and number of terms 2U. What is...

...±, _,1,*, -, 2,-, &c. Ans. 3775. 33333 4. If the sum of an arithmetical series is 1455, the least term 5, and the number of terms 30 ; what is the common difference ? Ans. 3. 5. If the sum of an arithmetical series is 567, the first term 7, and the common difference 2 ; what...

...45 7 3' 3' l' 3' 3' 2' 3' &c" Ans' 3775' 4. If the sum of an arithmetical series is 1455, the least term 5, and the number of terms 30 ; what is the common difference1? Ans. 3. 5. If the sum of an arithmetical series is 567, the first term 7, and the common...

...I=l4n+2»a — 2«=1134; .•.na-f6»+ 9=; <f=2 ; ) 576, and re=21. Ex. 3. The sum of an arithmetic series is 1455, the first term 5, and the number of terms 30. What is the common difference 1 Ans. 3. Ex. 4. The sum of an arithmetic series is 1240, common difference 4, and number of terms...