sum of powers

Power of a Lens - Whenever a ray of light passes through a lens (except when it passes through the optical center) it bends. The bending of light rays towards the principal axis is called convergence and bending of light rays away from the principal axis is called divergence. The degree o..

In case of a polynomial of one variable the highest power of the variable is called the degree of the polynomial. 3y-7y 3 has degree 3 and..

Conclusion - The rate of a reaction is measured in terms of change in concentration of a reactant or a product with time. Rate of a reaction is measured by following the concentration changes either by chemical analysis or by observing some other property such as color and optical rotation. The rat..

.e., for an object O placed at a distance u from it, the image I must be formed at a distance v. Such a lens is called an equivalent lens and its focal length is called the equivalent focal length. Writing the lens equation in this case, we get Comparing equations (iii) and (iv) we get Hence, when ..

>When the resistances are connected in parallel the reciprocal of the equivalent resistance is equal to the sum of the reciprocals of the individual resistances. The amount of heat generated in a conductor of resistance 'R', when current 'I' flows through it in a given time 't', is given ..

Electric potential is the condition that determines the flow of charge. Electrical potential at a point in an electric field is defined as the amount of work done in bringing a unit of positive charge from infinity to that point. Electrical potential is a scalar quantity. The potential diff..

Limits- operations on functions Continuity of a function Intermediate value, extreme value theorem Derivatives, differentiability Derivatives of functions Chain rule Rolle's theorem, mean value theorem, and L'Hopital's rule Maxima, minima, inflection points, intervals Newton's method (app..

Case (i) when m 1 = m 2 , i.e., when both the colliding bodies are of the same mass. The velocity of body A after collision, is equal to the velocity of body B before the collision. From equation (v), The velocity of body B after collision, is equal to the velocity of body A before coll..

. The wavelengths absorbed appear as dark lines or bands on a bright background. According to Kirchhoff's law an element can absorb only those wavelengths from continuous light, which it emits at the same temperature. This law was used to study structure of the Sun when Fraunhoffer explained existe..

of (a + b) n and is given by - If n is an odd natural number, then there are two middle terms in the expansion of (a + b)n and are given by i) The sum of all binomial coefficients in the expansion of (1+x) n is 2 n . ii) The sum of all even binomial coefficients in the expressio..