x-1/x=6 ,evaluate x²+ 1/x²
Answers
Answered by
0
Answer:
x+
x
1
=6
On squaring both sides we get,
\begin{lgathered}{(x + \frac{1}{x}) }^{2} = {6}^{2} \\ \\ {x}^{2} + \frac{1}{ {x}^{2} } + 2(x)( \frac{1}{x} ) = 36 \\ \\ {x}^{2} + \frac{1}{ {x}^{2} } = 36 - 2 \\ \\ {x}^{2} + \frac{1}{ {x}^{2} } = 34\end{lgathered}
(x+
x
1
)
2
=6
2
x
2
+
x
2
1
+2(x)(
x
1
)=36
x
2
+
x
2
1
=36−2
x
2
+
x
2
1
=34
Identity I used =
{(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab(a+b)
2
=a
2
+b
2
+2ab
\boxed{ \textsf{ \red{ Hence\:answer\:is\:34 }}}
Henceansweris34
Answered by
32
Step-by-step explanation:
Step-by-step explanation:
( 31 + 28 + 31 + 30 + 31 + 30 + 31 + 15 ) = 227 days = (32 weeks + 3 days) = 3 odd days. Total number of odd days = (0 + 1 + 1 + 3) = 5 odd days. Hence, as the number of odd days = 5 , given day is Friday.
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