7th Class Mathematics Exponents and Power

  • question_answer 3) Express each of the following numbers using exponential notation:

    Answer:

                    (i) 512                

    2 512
    2 256
    2 128
    2 64
    2 32
    2 16
    2 8
    2 4
    2 2
    1
    \[\therefore \]  \[512=2\times 2\times 2\times 2\times 2\times 2\times 2\times 2\times 2\]                 \[={{2}^{9}}\]                 (ii) 343                
    7 343
    7 49
    7 7
    1
    \[\therefore \]  \[343=7\times 7\times 7={{7}^{3}}\] (iii) 729
    3 729
    3 243
    3 81
    3 27
    3 9
    3 3
    1
    \[\therefore \]  \[729=3\times 3\times 3\times 3\times 3\times 3={{3}^{6}}\] (iv) 3125
    5 3125
    5 625
    5 125
    5 25
    5 5
    1
    \[\therefore \]  \[3125=5\times 5\times 5\times 5\times 5={{5}^{5}}\]

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