Wednesday, January 19, 2011

Factors (lesson 1)

Watch the following videos and complete the task that follows.

Video 1 Prime Factorisation






Video 2: Index Notation





Find the prime factors of the following, where possible express your answers in index notation
(a) 1432
(b) 131
(c) 11760
(d) -48
post your answers under comment

20 comments:

  1. Dear teacher I apologize for my absence the past few days. I was ill.
    ANSWERS:
    a) 2 to the power of 3 x 179
    b) prime number
    c) 2 to the power of 4 x 3 x 5 x 7 to the power of two
    d) 2 to the power of 4 x -3

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  2. a) 2^3*179
    b) 131
    c) 2^4*7^2*5*3
    d)2^4*-3

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  3. a) 2 to the power of 3 x 179
    b) 131 is a prime number itself
    c) 2 to the power of 4 x 3 x 5 x 7 to the power of 2
    d) 2 to the power of 4 x negative 3/-3

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  4. This comment has been removed by the author.

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  5. 1)2^3x179
    2)131 is a prime by itself
    3)2^4x3x5x7x7
    4)2^4x-3

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  6. 1) 2 to the power of 3 x 179
    2)131
    3)2 to the power of 4 x 3 x 5 x 7 to the power of 2
    4)2 to the power of 4 x -3

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  7. a)2 to the power of 3x179
    b)131 is a prime number
    c)2 to the power of 4x3x5x7 to the power of 2
    d)2 to the power of 4x-3

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  8. This comment has been removed by the author.

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  9. This comment has been removed by the author.

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  10. a)179*2^3
    b)131^1
    c)7^2*2^4*5*3
    d)N/A

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  11. 1)2x2x2x179
    2)131 is a prime number
    3)2x2x2x2x3x5x7x7
    4)Not applicable

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  12. A)2x2x2x179
    B)131
    C)2x2x2x2x3x5x7x7
    D)Not applicable

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  13. 1) 2^3x179
    2) 131 is a prime number
    3) 2^4x3x5x7^2
    4) no answer"

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  14. a) 2 to the power of 3 times 179
    b) 131 is a prime number
    c)x2 to the power of 4 x3x5x7x7
    d) no answer

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  15. 1)2 to the power of 3 times 179
    2)131 is a prime number
    3)2 to the power of 4 x 3 x 5 x 7 to the power of 2
    4) No Answer

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  16. 1)1432/2=716 716/2=358 358/2=179, so 2 to the power of 3x179.(2^3x179)
    2)131 is a prime number by itself.
    3)11760/2=5880 5880/2=2940 2940/2=1470 1470/2=735 735/5=147 147/3=49 49/7=7 7/1=1 So 2^4x5x3x7x1
    4) No answer.

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  17. 2 to the power of 3 x 179

    131 is a prime No.

    2 to the power of 4x3x5x7 to the power of 2

    No answer

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  18. 2 is to the power of 3 * 179
    131 is a prime number by itself
    2^4*3*5*7^2
    Not applicable

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  19. 1) 2 to the power of 3 x 179
    2) 131
    3) 2 to the power of 4 x 3 x 7 to the power of 2
    4) not applicable

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  20. (a) 2^3 x 179
    (b) 131 is a prime number
    (c) 2^4 x 5 x 3 x 7^2
    (d) There are no negative prime numbers.

    ReplyDelete