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Preeti Dabral 3 years ago
If we fall prey to flattery then we have to pay the heavy cost for it. It can even cost us our life like in the case of the fly. Fly, who fell for the spider's flattery and seduction lost her life and became the food of the spider.
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Preeti Dabral 3 years ago
Birth rate, death rate and migration are the three major components of population growth.
(i) Birth rate is the number of live births per
thousand persons in a year.Birth rate is the major component of growth because if birth rate is higher than death rate, growth rate will automatically increase.
(ii) Another major component is death rate. Death rate is the number of deaths per thousand persons in a year.These days we find that there are improved health facilities and there is awareness among people about their health maintenance. With the result, death rate has declined leading to growth rate of the population.
(iii) Migration is another component of population growth.Migration is the movement of people across regions and territories. Though internal migration does not change the population of the country but it does affect the distribution of population within the country International migration definitely changes the size of the population.
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Preeti Dabral 3 years ago
{tex}\frac { x } { a } + \frac { y } { b } = 2{/tex}
{tex}\frac { b x + a y } { a b } = 2{/tex}
{tex}bx + ay = 2ab{/tex}........(i)
{tex}ax - by = (a^2 - b^2){/tex}...(ii)
Multiplying (i) by b and (ii) by a
{tex}b^2x + bay = 2ab^2{/tex}.............(iii)
{tex}a^2x - bay = a(a^2 - b^2){/tex}........(iv)
Adding (iii) and (iv),we get
{tex}b^2x + a^2x = 2ab^2 + a^3 - ab^2{/tex}
{tex}x(b^2 + a^2) = 2ab^2 + a^3 - ab^2{/tex}
{tex}x(b^2 + a^2) = ab^2 + a^3{/tex}
{tex}x(b^2 + a^2) =a(b^2 + a^2){/tex}
{tex}x = \frac { a \left( b ^ { 2 } + a ^ { 2 } \right) } { \left( b ^ { 2 } + a ^ { 2 } \right) } = a{/tex}
Putting x = a in (i),we get
{tex}b \times a + a y = 2 a b{/tex}
{tex}a y = 2 a b - a b \Rightarrow a y = a b{/tex} or y = b
{tex}\therefore{/tex} solution is x = a, y = b
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Rithika S 3 years, 1 month ago
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