English, asked by hunarpreet07, 2 months ago

ch 1 class 9

ques is in attachment​

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Answered by iTzaSthA
0

Answer:

أنا لا أعرف أخي أو أخته أنا آسف جدا آسف

Answered by Bidikha
1

Answer:

 =  \frac{ \sqrt{5}  + 1}{ \sqrt{5} - 1 }  +  \frac{ \sqrt{5}  - 1}{ \sqrt{5}  + 1}

 =  \frac{( \sqrt{5} + 1)( \sqrt{5}  + 1) }{( \sqrt{5}  - 1)( \sqrt{5} + 1) }  +  \frac{ \sqrt{5 }  - 1)( \sqrt{5}  - 1)}{( \sqrt{5}  + 1)( \sqrt{5} - 1) }

 =  \frac{ {( \sqrt{5}  + 1)}^{2} }{ {( \sqrt{5}) }^{2}  -  {1}^{2} }   +  \frac{ {( \sqrt{5} - 1) }^{2} }{ { \sqrt{5} }^{2}  -  {1}^{2} }

 =  \frac{5 + 1 + 2 \sqrt{5} }{5 - 1}  +  \frac{5 + 1 - 2 \sqrt{5} }{5 - 1}

 =  \frac{6  + 2 \sqrt{5} }{4}  +  \frac{6 - 2 \sqrt{5} }{4}

 =  \frac{6 + 2 \sqrt{5} + 6 - 2 \sqrt{5}  }{4}

 =  \frac{12}{4}

 = 3

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