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6. In this problem you will learn how to use Dirac delta functions to solve integrals and define densities of point charges. (a) Using the definition of Dirac delta function, evaluate the following integrals 15) 产00 (i) (4x2-8x-1) δ(x-4) dx (ii) sin x δ(x-π/2) dx x3 δ(x + 3)dx In(x + 3)δ(x + 2)dx (b) What is the volume charge density of an electric dipole, consisting of a point charge -q at (c) What is the integral of this charge density over a spherical volume of radius R = 2P1 centered (iii) (iv) (v) (4x-3)3(3x + 1)dr. the origin and a point charge +q at P? at the origin?
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