12.07.2015 Views

Stæ 503 Seinni hluti Kaflar 4–6 - Menntaskólinn við Hamrahlíð

Stæ 503 Seinni hluti Kaflar 4–6 - Menntaskólinn við Hamrahlíð

Stæ 503 Seinni hluti Kaflar 4–6 - Menntaskólinn við Hamrahlíð

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ÆFING 5.2.3viiDæmi 3. (a)a n =12n−1 . (b)a n= 13n .Dæmi 4. (a) 2,4/3,8/9,16/27,32/81. (b) 1,1,2,3,5. (c) 2,2,2,2,2.Æfing 5.2.3Dæmi 1. a 1 =−25Dæmi 2. a 1 = 1 12Dæmi 3. a 1 =−14, d=2.Dæmi 4. d=− 3 2 ,x 1= 40. Fyrstu fimm liðir eru:40,38.5,37,35.5,34.Dæmi 5. a 1 =−1, q=− 2 3Dæmi 6. q= 1 5 ,t 1= 1000. Fyrstu fimm liðir eru:1000,200,40,8,8/5.Dæmi 7. 123Dæmi 8. 21Dæmi 9.(a) 2/3 (b) 405·(2/3) 14 = 8192059049Dæmi 10.(a)(i) 3, (ii) 50 (b) 798Dæmi 11.(a)(i) 3, (ii) 5 (b)a= 5 2 ,b= 310 .Dæmi 12.(a)a 1 =−8,a 2 =−17,a 3 =−26 (b) -485Dæmi 13. 3 20 −1.

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