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Class 9 SELINA Solutions Maths Chapter 7 - Indices (Exponents)

Indices (Exponents) Exercise Ex. 7(A)

Solution 1

(i)

 

 

(ii)

 

 

 

 

(iii)

 

 

 

 

(iv)

 

 

 

(v)

Solution 2

(i)

 

 

(ii)

 

 

 

(iii)

 

 

 

(iv)

 

 

 

 

Solution 3

(i)

 

(ii)

 

Solution 4

(i)

 

(ii)

 

(iii)

 

 

(iv)

Solution 5

Solution 6

 

 

 

 

Solution 7

(i)

 

(ii)

Solution 8

Solution 9

Solution 10

(i)

 

(ii)

Indices (Exponents) Exercise Ex. 7(B)

Solution 1

(i)

 

(ii)

 

 

(iii)

 

(iv)

Solution 2

(i)

(ii)

 

(iii)


(iv)

Solution 3

(i)

(ii)

 

Solution 4

(i)

 

 

(ii)

 

 

(iii)

Solution 5

 

Solution 6

 

 

 

Solution 7

(i)

 

(ii)

Solution 8

Solution 9

Solution 10

  

 

Solution 11

  

 

Solution 12

  

 

Solution 13

  

 

Solution 14 (i)

 

 

  

 

 

 

 

Solution 14 (ii)

  

 

Solution 14 (iii)

  

 

Solution 14 (iv)

 

 

 

 

Solution 14 (v)

 

Solution 14 (vi)

9x+2 = 720 + 9x

9x+2 - 9x = 720

9x (92 - 1) = 720

9x (81 - 1) = 720

9x (80) = 720

9x = 9

9x = 91

x = 1

Indices (Exponents) Exercise Ex. 7(C)

Solution 1

  

Solution 2

  

Solution 3

Solution 4

  

Solution 5

Solution 6

  

Solution 7

  

Solution 8

  

Solution 9

  

Solution 10

Solution 11

Solution 12

  

Solution 13

Solution 14

Solution 15 (i)

Solution 15 (ii)

Solution 16

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