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Ask QuestionPosted by Ekansh Srivastava 4 years, 5 months ago
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Vedika Gupta 4 years, 5 months ago
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Sia ? 4 years, 5 months ago
(2a)3 + (4b)3 + 2 × 2a × 4b(2a+4b)
8a + 64b + 8ab + 16a2b + 32ab2
Posted by C Anil Kumar 4 years, 5 months ago
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Sia ? 4 years, 5 months ago
(a−2b−3c)2
According to the equation ,
(a+b+c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca
So we get,
Using the formula we can it write it as
(a−2b−3c)2 = a2+(−2b)2+(−3c)2+2a(−2b)+(2(−2b)(−3c)+2(−3c)a
On further calculation we get,
(a−2b−3c)2 = a2 + 4b2 + 9c2 − 4ab + 12bc − 6ac
Posted by C Anil Kumar 4 years, 5 months ago
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Sia ? 4 years, 5 months ago
the following rules are followed for writing the number of electrons in different energy levels or shells.
(i) the maximum number of electrons presents in a shell is given by the formula 2n2 where ′n′ is the orbit number of energy level index 1,2,3... hence the maximum number of electrons in different shells are as follows :
First orbit or K-shell will be = 2 × 12 × 2 Second orbit or L shell will be = 2 × 22 = 8 third orbit or M shell will be = 2 × 32 = 18 fourth orbits or N-Shell will be = 2 × 42 = 32 and so on.
(ii) The maximum number of electrons that can be accommodated in the outermost orbit is 8.
(iii) Electrons are not accommodated in a given shell unless the inner shells are filled. That is the shells are filled in a stepwise manner.
Posted by Gargi Raut 4 years, 5 months ago
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Sia ? 4 years, 5 months ago
<a href="https://mycbseguide.com/ncert-solutions.html">https://mycbseguide.com/ncert-solutions.html</a>
Posted by Utkarsh Dhote 4 years, 5 months ago
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Utkarsh Dhote 4 years, 5 months ago
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Ratul Garg 4 years, 5 months ago
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Purva Ghule 4 years, 5 months ago
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Gagan Kaur 4 years, 5 months ago
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Given BA || ED and BC || EF.
To show {tex}\angle{/tex}ABC = {tex}\angle{/tex}DEF.
Construction Draw a ray EP opposite to ray ED. 
Proof In the figure, BA || ED or BA || DP
{tex}\therefore{/tex} {tex}\angle{/tex}ABP = {tex}\angle{/tex}EPC [corresponding angles]
{tex}\Rightarrow{/tex} {tex}\angle{/tex}ABC = {tex}\angle{/tex}EPC ....(i)
Again, BC || EF or PC || EF
{tex}\therefore{/tex} {tex}\angle{/tex}DEF = {tex}\angle{/tex}EPC [corresponding angles] ....(ii)
From eqs.(i) and (ii),
{tex}\angle{/tex}ABC = {tex}\angle{/tex}DEF
Posted by Jaideep Hanumant Bhosale Bhosale 4 years, 5 months ago
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Posted by Raghav Garg 4 years, 5 months ago
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Sia ? 4 years, 5 months ago
Two type of conducting tissues in plants exist namely:
1) Xylem : It serves as conducting tissue for water and minerals from root to leaves and stem (aerial parts), (unidirectional flow).
2) Phloem : It transports food material from leaves to other parts of plants (bidirectional Flow)
Posted by Sanchi Bhana 4 years, 5 months ago
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Sia ? 4 years, 5 months ago
The following are the two reasons in support of the given statement:
1. Democracy presents for a government based on the acquiescence of the people. Therefore, all the decision must be taken by the democratically elected government and not by any other person or organization.
2. If the elected representatives or government gives the power of decision-making to others it may result in the conclusion of democracy. We can take the example of Pakistan, where the Military under the command of Parvez Musharraf has taken over the government. Though the people of Pakistan formally elect the parliament and government the power lie in the hands of the military.
Posted by Tanu Shri Saini 4 years, 5 months ago
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Posted by Tanu Shri Saini 4 years, 5 months ago
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Posted by Prem Modi 4 years, 5 months ago
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Tanu Shri Saini 4 years, 5 months ago
Tanu Shri Saini 4 years, 5 months ago

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Onkar Bung 4 years, 5 months ago
1Thank You