5176

Mathematics Integration Level: Misc Level

Special type

Rule to evaluate

\int \frac{x^{2}+A}{x^{4}+kx^{2}+A^{2}}dx, A>0  or  \int \frac{x^{2}-A}{x^{4}+kx^{2}+A^{2}}dx, A<0

Where k is a real number (positive, negative or zero)

(i) Divide the numerator and denominator by x2

(ii) For x2 + A in the numerator put x - A/x =t as substitution . And for x2 - A in the numerator, put x + A/x = t

\int \frac{x^{2}}{x^{4}+1}dx = I




5175

Mathematics Integration Level: Misc Level

Special type

Rule to evaluate

\int \frac{x^{2}+A}{x^{4}+kx^{2}+A^{2}}dx, A>0  or  \int \frac{x^{2}-A}{x^{4}+kx^{2}+A^{2}}dx, A<0

Where k is a real number (positive, negative or zero)

(i) Divide the numerator and denominator by x2

(ii) For x2 + A in the numerator put x - A/x =t as substitution . And for x2 - A in the numerator, put x + A/x = t

\int \frac{x^{2}+4}{x^{4}+kx^{2}+16}dx




5174

Mathematics Integration Level: Misc Level

Special type

Rule to evaluate

\int \frac{x^{2}+A}{x^{4}+kx^{2}+A^{2}}dx, A>0  or  \int \frac{x^{2}-A}{x^{4}+kx^{2}+A^{2}}dx, A<0

Where k is a real number (positive, negative or zero)

(i) Divide the numerator and denominator by x2

(ii) For x2 + A in the numerator put x - A/x =t as substitution . And for x2 - A in the numerator, put x + A/x = t

\int \frac{1-x^{2}}{1+x^{4}}dx




5173

Physics Wave Optics Level: Misc Level

Consider two diffraction gratings with the same slit separation, the only difference being that one grating has 3 slits and the other 4 slits. If both gratings are illuminated with a beam of the same monochromatic,

a. both gratings produce the same separation between orders.

b. both gratings produce the same separation between orders, but the orders are better defined with the 4- slit grating.

c. the grating with 3 slits produces the greater separation between orders.

d. the grating with 4 slits produces the greater separation between orders.




5163

Mathematics Integration Level: Misc Level

Special type (Partial fraction)
When only even powers of x occur in the numerator as well as the denominator, substitute x^{2}=y to make partial fractions. Once the partial fractions are formed substitute back y=x^{2} and integrate.

\int \frac{Sinx}{Sin4x}dx




5162

Mathematics Integration Level: Misc Level

Special type (Partial fraction)
When only even powers of x occur in the numerator as well as the denominator, substitute x^{2}=y to make partial fractions. Once the partial fractions are formed substitute back y=x^{2} and integrate.

\int \frac{x^{2}}{1-x^{4}}dx




5161

Mathematics Integration Level: Misc Level

Special type (Partial fraction)
When only even powers of x occur in the numerator as well as the denominator, substitute x^{2}=y to make partial fractions. Once the partial fractions are formed substitute back y=x^{2} and integrate.

\int \frac{x^{2}}{x^{4}-x^{2}-12}dx=I




5160

Mathematics Integration Level: Misc Level

Special type (Partial fraction)
When only even powers of x occur in the numerator as well as the denominator, substitute x^{2}=y to make partial fractions. Once the partial fractions are formed substitute back y=x^{2} and integrate.

\int \frac{x^{2}}{(x^{2}+1)(x^{2}+4)}dx=I

 




5159

Mathematics Integration Level: Misc Level

Integerate the following by parts by using ILATE.
I = inverse trigonometric
L = logarithmic
A = algebraic
T = trigonometric
E = exponential

\int \frac{Sin^{-1}x}{x^{2}}dx




5158

Mathematics Integration Level: Misc Level

Integerate the following by parts by using ILATE.
I = inverse trigonometric
L = logarithmic
A = algebraic
T = trigonometric
E = exponential

\int Cosec^{3}xdx=I




5157

Mathematics Integration Level: Misc Level

Integerate the following by parts by using ILATE.
I = inverse trigonometric
L = logarithmic
A = algebraic
T = trigonometric
E = exponential

\int e^{x}Sin^{2}xdx




5156

Mathematics Integration Level: Misc Level

Integerate the following by parts by using ILATE.
I = inverse trigonometric
L = logarithmic
A = algebraic
T = trigonometric
E = exponential

\int e^{ax}Cos(bx+c)dx




5155

Physics Properties Of Matter Level: Misc Level

The weight that will cause a wire of diameter d to stretch a given distance, for a fixed length of wire, is 

a. proportional to d.

b. proportional to d 2.

c. independent of what the length of the wire is.

d. independent of d.




5153

Physics Properties Of Matter Level: Misc Level

A copper wire is found to break when subjected to minimum tension of 36 N. If  the wire diameter were half as great, we would expect the wire to break when subjected to a minimum tension of ?




5152

Physics Wave Optics Level: Misc Level

The index of refraction of diamond is 2.42. This means that a given wavelength of light travel

a. 2.42 times faster in diamond than it does in vacuum.

b. 2.42 times faster in vacuum than it does in diamond.

c. 2.42 times faster in diamond than it does in air.

d. 2.42 times faster in air than it does in diamond.


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