Помогите молю от 1 до 6 номера

1
$1)2 ^{4/3 } *3 ^{2/3} *3 ^{2/7/3} /2 ^{-2/3} =2^2*3^3=4*27=108$
$2)9/4+3*1=2,25+3=5,25$
$3)(4 \sqrt[3]{2} +1/ \sqrt[]{4} )*1/ \sqrt[3]{2} =4+1/2=4,5$
2
$1) \sqrt[3]{a^6b^3/c^3} =a^2b/c$
$2)a ^{-3} *a^2=a ^{-1} =1/a$
3
$1) \sqrt{a} ( \sqrt[4]{a} -3)( \sqrt[4]{a} +3)/7( \sqrt[4]{a} +1)= \sqrt{a} ( \sqrt[4]{a} -3)/7$
$2)( \sqrt{x} +1)/( \sqrt{x} -1)( \sqrt{x} +1)=1/( \sqrt{x} -1)$
4
3/4=9/12 9/12<11/12<br> $\sqrt[5]{(3/4)^3} \ \textless \ \sqrt[5]{(11/12)^3}$
5
(∛a-∛b)/∛(ab) *∛(ab)(∛a-∛b)(∛a+∛b)/(∛a+∛b)=(∛a-∛b)²
6
a1=5/3,a2=5/9
q=a2/a1=5/9:5/3=5/9*3/5=1/3
S=a1/(1-q)=5/3;(1-1/3)=5/3:2/3=5/3*3/2=5/2=2,5