ex 1.6 class 9

ex 1.6 class 9

Question 1:

Find:

(i) 6412

(ii)3215

(iii)12513

Solution:

(i)6412

=(8×8)12

=82×12

=8

(ii)3215

=(2×2×2×2×2)15

=25×15

=2

(iii)12513

=(5×5×5)13

=53×13

=5


Question 2:

Find: 

(i)932

(ii)3225

(iii)1634

(iv)125−13

Solution:

(i).932

=3×232

=32×32

=33=27

(ii)3225

=(2×2×2×2×2)25

=25×25

=4

(iii)1634

=(2×2×2×2)34

=24×34

=23=8

(iv)125−13

=(5×5×5)−13

=53×−13

=5−1=15



Question 3:

Simplify:

(i) 223.215

(ii)(313)7

(iii)11121114

(iv) 712.812

Solution 3:

(i) 223.215

= 223+15

=210+315

=21315

(ii) (313)7

=(3)73

(iii)11121114

=1112−14

=112−14

=1114

(iv) 712.812

=(7×8)12

=(56)12