Question

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Answer 1

here is your answer;-)

31. a) less than 1

32. a) btw. optical centre and F

33. c) at less than f

34. a) within F

35. d) beyond 2F

36. c) 4.9

37. b) btw. 10 and 20 cm

38. c) at less than 15 cm

39. b) at 24 cm

40. c) beyond 16 cm