Question

class 7 ch- exponents​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

 2a)  Since 2^3  = 8

       = 8^2 ÷ 8^1

        = 8^2-1

       = 8^1

  2b) { (2^3)^4  x  2^8} ÷ 2^12

        = 2^3x4 x 2^8} ÷ 2^12

         = {2^12 x 2^8}  ÷ 2^12

          ( since bases are same powers can be calculated)

          { 12 + 8} - 12

           = 20 -12

          = 2^8

2c) ( since bases are same powers can be calculated)

     =   (5-2) + 3

      = 3 +3

     = 3^6

2d)( since bases are same powers can be calculated)

         = (2+4) - 3

         = 6 -3

        = 8^3

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