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

## Indices (Exponents) Exercise Ex. 7(A)

### Solution 1(a)

Correct option: (ii)

### Solution 1(b)

Correct option: (i)

### Solution 1(c)

Correct option: (iii)

### Solution 1(d)

Correct option: (iv) 6

### Solution 1(e)

Correct option: (i) 10

### Solution 1(f)

Correct option: (ii) 12

(i)

(ii)

(iii)

(iv)

(v)

(i)

(ii)

(iii)

(iv)

(i)

(ii)

(i)

(ii)

(iii)

(iv)

(i)

(ii)

(i)

(ii)

## Indices (Exponents) Exercise Ex. 7(B)

### Solution 1(a)

Correct option: (i)

### Solution 1(b)

Correct option: (ii)

### Solution 1(c)

Correct option: (iii)

### Solution 1(d)

Correct option: (i)

### Solution 1(e)

Correct option: (i)

### Solution 1(f)

Correct option: (ii) 5

### Solution 1(g)

Correct option: (i)

(i)

(ii)

(iii)

(iv)

(i)

(ii)

(iii)

(iv)

(i)

(ii)

(i)

(ii)

(iii)

(i)

(ii)

### Solution 15 (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