Differential Equations Answers

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Q.4.7 Jack wishes to purchase a new cell phone. He is required to pay a deposit of 15%of the full price of the cell phone. If the deposit amount is R1 200, what is the fullprice of the cell phone?



X2uxx +2xyuxy+uyy=u


(x^2-y^2 -zy)p +(x^2-y^2-zx)q =z(x-y)


Fourier cosine integral of f(x) is


A)


cos Ax ff(t)sina tdt da 0


d cos 2x ff(t) cos at dt da


B) cosax ff(t)sintdtdx


D) 25 fcos Ax f f(t)cos At dt da


(d^2 y)/〖dx〗^2 +2 dy/dx+5y=34cos2x


6n + 4 = 16, find the value of 5n - 7


X^3=a+bp


xdx+ydy=a2(xdy-ydx)/x2+y2

(D^2-D'^2-3D+3D')z=e^x-2y


erify that the following cquations are integrable and determine their solutions.
x(y^2-a^2 )dx+y(x^2-t^2 )dy-z(y^2-α^2 )dz=0, where α is constant
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