Add 2 numbers

Tentukan nilai b $daH$ 
$\dfrac {9^{°}+8^{°}+8^{°}+8^{°}} {3^{0}+3^{6}+3^{6}}\times \left(12^{6}+12^{6}+12^{6}\right)=2^{b}$ 

$7$ Simplify 
$\left(i\right)$ $\dfrac {4+\sqrt{5} } {4-\sqrt{5} }+\dfrac {4-\sqrt{5} } {4+\sqrt{5} }$ 
$\left(ii\right)$ $\dfrac {1} {\sqrt{3} +\sqrt{2} }-\dfrac {2} {\sqrt{5} -\sqrt{3} }-\dfrac {3} {\sqrt{2} -\sqrt{5} }$ 
$\left(ii\right)$ $\dfrac {2+\sqrt{3} } {2-\sqrt{3} }+\dfrac {2-\sqrt{3} } {2+\sqrt{3} }+\dfrac {\sqrt{3} -1} {\sqrt{3} +1}$ 
$\left(iV\right)$ $\right)$ $8\sqrt{3} $ $\dfrac {2\sqrt{6} } {\sqrt{2} +\sqrt{3} }+\dfrac {6\sqrt{2} } {\sqrt{6} +\sqrt{3} }-\sqrt{6} +\sqrt{2} $ 
$8$ Prove that 

value of n? $-\times -=2^{n}$ $3^{6}+3^{6}+3^{6}+3^{6}+3^{°}+3^{6}$ $2^{4}+2^{4}+2^{4}+2^{4}$ 2", what is the 
$c-123$ ti $13$ $\bar{5} $ 
$2$ $-1$ $-=2$ $2$ 
6. $\left(2$ marks) The sum of the consecutive odd numbers $123+125+127+129+...+k$ 
is $1000283$ Find the value of k. $122$ $122$ $2$ $x$ $2$ 

7. $\left(2$ Find the yalue of $2019\times 20182017-2017\times 20182019$ $→$ $k-123+2$ 
$→$ 

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