Ask questions which are clear, concise and easy to understand.
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Preeti Dabral 3 years ago
as men went to battle, women stepped in to undertake jobs that earlier only men were expected to do. The war led to the snapping of economic links between some of the world's largest economic powers which were now fighting each other to pay for them.
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Preeti Dabral 3 years ago
the ability to move freely or be easily moved: Some neck injuries cause total loss of mobility below the point of injury.
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Preeti Dabral 3 years ago
{tex}\text { Let } \alpha \text { and } \beta \text { are the zeroes of the polynomial } f(x)=a x^2+b x+c \text {. }{/tex}
{tex}\therefore \quad(\alpha+\beta)=\frac{-\mathbf{b}}{\mathbf{a}} and \alpha \beta=\frac{\mathbf{c}}{\mathbf{a}} According to the question, \frac{1}{\alpha} and \frac{1}{\beta} are the zeroes of the required quadratic polynomial{/tex}
Sum of zeroes of required polynomial
{tex} \begin{aligned} \mathbf{S}^{\prime} & =\frac{1}{\alpha}+\frac{1}{\beta} \\ & =\frac{\alpha+\beta}{\alpha \beta} \\ & =\frac{-\mathbf{b}}{\mathbf{c}} \end{aligned} [From equation (i) and (ii)] and product of zeroes of required polynomial =\frac{1}{\alpha} \times \frac{1}{\beta}. P^{\prime}=\frac{1}{\alpha \beta} =\frac{a}{c} [From equation (ii)]{/tex}
Equation of the required polynomial.
{tex} =\mathbf{k}\left(\mathbf{x}^2-\mathbf{S}^{\prime} \mathbf{x}+\mathbf{p}^{\prime}\right) where $k$ is any non-zero constant =k\left(x^2-\left(\frac{-b}{c}\right) x+\frac{a}{c}\right) [From equation (iii) and (iv)] =k\left(x^2+\frac{b}{c} x+\frac{a}{c}\right) {/tex}
Posted by Pem Lhamu Sherpa 3 years ago
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Preeti Dabral 3 years ago
Regeneration is a term which is used in relation to reproduction. Which means producing its own kind likewise regeneration is the ability of some organisms to give rise to new organisms when the individual is cut or broken up into many pieces, it is seen in multicellular organisms e.g Hydra and Planaria.
Regeneration in multicellular organism like Hydra
- It is carried out by specialised cells.
- When Hydra is cut or broken up into many piecs these specialised cells proliferate and make large number of cells.
- From the mass of cells, differentiation occurs developing various cell types and tissues.
- These changes take place in an organised sequence which lead to development of new individual
Aanya Sharma 3 years ago
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Preeti Dabral 3 years ago
कविता में सबसे छोटे होने की कल्पना क्यों की गई है? कविता में सबसे छोटे होने की कल्पना इसलिए की गई है क्योंकि घर के सबसे छोटे सदस्य को सभी लोगों का प्यार और दुलार अधिक मिलता है और खासकर माँ के साथ तो उसका जुड़ाव कुछ ज्यादा ही होता है।
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Preeti Dabral 3 years ago
Human reproduction is any form of sexual reproduction resulting in human fertlization, typically involving sexual intercourse between a man and a woman. During sexual intercourse, the interaction between the and female reproductive system results in fertilization of the woman's ovum by the man's sperm.
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Preeti Dabral 3 years ago
This statement has great relevance in the context of the Antarctic environment. A small change in the environment can give rise to drastic developments. Antarctica has small biodiversity. The example of small grass called phytoplankton can be studied in this context. These microscopic grasses undergo the process of photosynthesis and serve as food for a number of marine birds and animals. The author says if there is further depletion of the ozone layer, it will affect the phytoplankton’s and the carbon cycle on the globe. This whole process can jeopardize the existence of all marine birds and animals. So if we take care that processes carried over by these small grasses are carried out properly, the bigger animals and birds will fall into the place on their own.
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Preeti Dabral 3 years ago
Amines are the derivative of amonia in which one two three replaced hydrogen of alkyl or aryl group
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Preeti Dabral 3 years ago
The Lok Sabha, unless sooner dissolved, continues to operate for five years for time being from the date appointed for its first meeting.
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Preeti Dabral 3 years ago
Albert Einstein was a German-born theoretical physicist, widely acknowledged to be one of the greatest and most influential physicists of all time. Einstein is best known for developing the theory of relativity, but he also made important contributions to the development of the theory of quantum mechanics.
Posted by Aaditya Bishnoi 3 years ago
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Preeti Dabral 3 years ago
सर्दियों में जितनी गर्म रजाई उतनी अच्छी नींद और गर्मी में जितने काम कपड़े उतना सुकून। आपके जिस कपड़े को सूखने में तीन घंटे लगते है गर्मियों में उसी कपड़े को सर्दियों में तीन दिन लग जाते है कई बार तो क्योंकि सूर्यदेव के दर्शन दुर्लभ जो हो जाते है जाड़े के मौसम में।
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Preeti Dabral 3 years ago
BAL VIKAS PUBLIC SCHOOL, AMBALA
NOTICE
17th February 2019
Library Book Lost
A library book has been lost. The book is NCERT Maths and it bears the library stamp. The book has a blue cover on it. If found, please return to the undersigned.
(Sign)
Shyam
VII 'A'
1Thank You