Leabhar Iomlán - Cogg

Caibidil 4: Seichimh – Sraitheanna– PatrúinCleachtadh 4.11. (i) 30, 36, 42 (ii) 27, 32, 37(iii) 9.5, 10.7, 11.9 (iv) 10, 13, 16(v) 38, 51, 66 (vi) 46, 38, 30(vii) 15, 20, 25 (viii) 28, 19, 10(ix) 54, 162, 486 (x) 30, 42, 56(xi) 3_4 , 1 1_4 , 1 3_4(xii) 16, 22, 29(xiii) 35, 48, 63 (xiv) 48, 96, 1921(xv) __ 30 , 142 , 1562. (i) 2, 6, 10, 14 (ii) 4, 9, 16, 25(iii) 1, 0, 3, 8 (iv) 8, 15, 24, 35(v) 0, 7, 26, 63 (vi)1_3 , 2_4 , 3_ 5 6(vii) 2, 4, 8, 16 (viii) 3, 9, 27, 81(ix) 2, 8, 24, 643. (i) 5, 9, 13, 17 (ii) 21 cm4. (i) 1, 2, 4, 7, 11, 16 (ii) 85. u 1 1, u 5 17, u 10 376. u 1 4, u 6 128, u 11 40967. (i) 5, 9, 13, 17, 21, 25(ii) 1, 5, 10, 17, 26, 37(iii) 2, 4, 8, 16, 32, 648. (i) C (ii) B (iii) D (iv) A9. (i) n 4 (ii) 2n (iii) 3n 1(iv) n 2 (v) n 2 1 (vi) (1) n(vii) 4n 3(viii)1__n(ix)n 1 _____n 2(x) (n 1)(n 2)10. Déantar an seicheamh ach an dá théarma roimhesin a shuimiú; 34, 55, 89, 14411. 1 5 10 10 5 11 6 15 20 15 6 11 7 21 35 35 21 7 11 8 28 56 70 56 28 8 1(i) 1, 2, 3, 4, 5, T n nn(n 1)(ii) 1, 3, 6, 10, 15, T n ________2(iii) 1, 2, 4, 8, 16, T n 2 n 1(n 1)(n 2)(iv) 3, 6, 10, 15, 21, T n _____________2Cleachtadh 4.21. (i) T n 5n 3, T 22 113(ii) T n 20n 4, T 22 436(iii) T n 13 3n, T 22 532. 3, 8, 13, 183. (i) 21 (ii) 20 (iii) 324. (i) a 4, d 3(ii) 4, 7, 10, 13, 16(iii) T 20 615. (i) 8 dtíl dhearga agus 22 tíl oráiste(ii) Ní bheidh mar T n 3n 6 38.6. a 3, d 2; 3, 5, 7, 9, 11, 137. (i) k 4(ii) p 28. (i) 12, 20, 28; T n 8n 4(ii) 124(iii) cruth 209. d 4 i.e. tairiseach is seicheamh comhbhreise é.10. d 2n 3 ní tairiseach é.11. (i) 8(ii) 49(iii) T n n 2 8(iv) Cruthúnas12. (i) Níl, mar T n 4n 2 87(ii) Ní tairiseach é T n T n- 1(iii) 5 leibhéal chríochnaithe agus 32 fágtha.13. 9 seachtaineCleachtadh 4.31. (i) S n 2n 2 n; S 20 780(ii) S n 51n n 2 ; S 20 620(iii) S n ________ n2 19n; S20 20 39(iv) S n 2n 2 9n; S 20 6202. (i) n 12, S 12 336(ii) n 100, S 100 5050(iii) n 20, S 20 4603. 7 dtéarma4. a 2, d 3; S 10 1155. 10 seachtaine6. (i) 69 (ii) 54 (iii) 5050317. (i) ∑ 4nn 1451(iii) ∑n 1n 99 ______108. 3, 7, 11, 15, 199. S 33 198010. (i) 51 fáinne(ii) 101 fáinne; S 20 107011. 14 théarma; d 412. 495013. a 3.5, d 0.1; S 30 148.514. 60Cleachtadh 4.41. (i) r 3; 243, 729(ii) r 1_ __ ___3 ; 181 , 124329(ii) ∑n 1(iii) r 2; 16, 32(iv) r 1; 1, 1(v) Ní seicheamh comhbhreise é(vi) r a; a 5 , a 6(vii) r 1.1; 1.4641, 1.61051(viii) Ní seicheamh comhbhreise é(ix) Ní seicheamh comhbhreise é(x) r 6; 972, 5832n 21 ______2290