Last Updated On [03-11-2023]
The equation $x^{2} \frac{d^{2} y}{d x^{2}}+5 x \frac{d y}{d x}+4 y=0$ has a solution $y(x)$ that is:
(A) A polynomial in $x$
(B) Finite series in terms of non-integer fractional powers of $x$
(C) Consists of negative integer powers of $x$ and logarithmic function of $x$
(D) Consists of exponential functions of $x$.
Question ID - 155579 :- The equation $x^{2} \frac{d^{2} y}{d x^{2}}+5 x \frac{d y}{d x}+4 y=0$ has a solution $y(x)$ that is:
(A) A polynomial in $x$
(B) Finite series in terms of non-integer fractional powers of $x$
(C) Consists of negative integer powers of $x$ and logarithmic function of $x$
(D) Consists of exponential functions of $x$.
The equation $x^{2} \frac{d^{2} y}{d x^{2}}+5 x \frac{d y}{d x}+4 y=0$ has a solution $y(x)$ that is:
(A) A polynomial in $x$
(B) Finite series in terms of non-integer fractional powers of $x$
(C) Consists of negative integer powers of $x$ and logarithmic function of $x$
(D) Consists of exponential functions of $x$.
(C) Consists of negative integer powers of $x$ and logarithmic function of $x$
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Consider a straight wing with rectangular planform of aspect ratio 10 and with a NACA 0012 airfoil. The span effectiveness factor for this wing is 0.95 . Assume the flow to be incompressible and governed by thin airfoil theory. The lift coefficient of this wing, at an angle of attack of 6 deg, is ______________(in three decimal places).
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