Question

Q9. Find the value of x , if :

a) 3^27 ÷ 3^14 = 3^2x            b) (6/7)^-4  X (6/7)^13 = (6/7)^3x
Q11. Which is greater?
a) 2.5X10^5 or 7.4 X 10^-5
b) 1.9 X 10^-6 or 1.2 X 10^-7
Q12. Simplify the following and write the multiplicative inverse of the answer obtained:
{(-3)^4 x (-3)^-4} ÷ (-3)^4
exponent= ^​

Answer 1

Answer:

Q9.

a) 3^13/3^2 = x

3^13 × 3^-2 = x

3^11 = x

b) (6/7) ^9 = (6/7) ^3 x

(6/7) ^9 × (6/9) ^-3 = x

(6/7) ^6 = x

Q 11.

a) 25 × 100000/10, 74/1000000

250000 > 0.000074

b) 19/10000000, 12/100000000

0.0000019 > 0.000000012

Q 12.

(-3) ^4 × 1/(-3^) -4 ÷ (-3) ^4

1/(-3) ^4

1/81

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