single solution 6. inconsistent, not dependent, has no solution 7. Consistent,
dependent, innumerable solution 8. Consistent, dependent, innumerable
solution 9. Consistent, dependent, single solution 10. Consistent, not
dependent, single solution.
Exercise 12.2
Exercise 12.3
Exercise 12.4
- a 2. c 3. b 4. b 5. b 6. b 7(1). c 7(2). d
7(3) d 8.
9
7
9.
2615- 27 11. 37 or 73 12. 30 years 13.
length 17 m. breadth 9 metre 14. spread of boat 10 km. per hour, spead of
corrent 5 km. per hour 15. starting salary Tk. 4000, yearly increment Tk. 25
- a. one b. (4, 6) c. sq.unit 17. a. 2
7
y
x
, 1
2
yx
, b. (3, 5),
53Exercise 13.1
1.7 Ges 75, 2. 129 Zg, 3. 100 Zg, 4. p^2 pqq^2 , 5. 0 , 6. n^2 , 7. 360 , 8. 320 ,
- 42 , 10. 1771 , 11. 620 , 12. 18, 13. 50, 14. 2 4 6 ........,, 15. 110 , 16. 0,
17.(m+n), 20. 50.
Exercise 13.2
- 2
1
, 2. 3 6. (3^14 1), 7. 9th term, 8.
31
, 9. 9th term, 10. x 15 ,y 45 ,