Question

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Answer 1

1.

a)7^-3= 1/7^3

b)(2/9)^-6= (9/2)^6

c)(1/4)^-5 =4^5

d)10^-100 = 1/10^100

2.

a) (-3/2)^3 b)(8/9)^2

3.

a)(1/5+1/3)÷25/9 = 8/15÷25/9= 8/15×9/25 = 24/75

b)(-2/5)^20=2^20/5^20.

c)(1/7×1/7^4)×7^10 = 1/7^5×7^10= 7^5.

d)bases are same then add powers.

(2^14)÷2^12 = 2^2 =4

4.

(8/5)^5×(5/8)7=(5/8)^7-×

(5/8)^2=(5/8)^7-×

bases equal then power s are also equal.

7-x=2

×=7-2=5