Exercice 88
a) [tex]( a^{n+1})^{2} = a^{2n+2}[/tex]
b) [tex]\frac{a^{4} }{( a^{3} )^{n} } = \frac{a^{4} }{a^{3n} } = a^{4-3n}[/tex]
c) [tex]((\frac{1}{a} ) )^{n}*a = \frac{1^{n} }{a^{n} } *a^{1} = a^{1-n}[/tex]
Exercice 89
volume= [tex]\frac{4}{3}[/tex]*π[tex]*6371 000^{3}[/tex]
