Question

pls answer this page im in help

Answer 1

Answer:

n= 3 this is the correct answer

Answer 2

Answer:

n = 14

Step-by-step explanation:

$(-7)^7$ ÷ $(-7)^{-n} = (-7)^{21}$

$=>(-7)^7$ x $\frac{1}{(-7)^{-n}} = (-7)^{21}$

$=>(-7)^7.(-7)^n = (-7)^{21}$  [∵ $\frac{1}{a^m} = a^{-m}$]

$=>(-7)^{(7+n)} = (-7)^{21}$  [∵ $a^m.a^n = a^{m+n}$]

∴ 7+n = 21

∴ n = 21 - 7 = 14