1
GATE CE 1999
MCQ (Single Correct Answer)
+1
-0.3
If $$c$$ is a constant, then the solution of $${{dy} \over {dx}} = 1 + {y^2}$$ is
A
$$y=sin(x+c)$$
B
$$y=cos(x+c)$$
C
$$y=tan(x+c)$$
D
$$y = {e^x} + c$$
2
GATE CE 1999
MCQ (Single Correct Answer)
+1
-0.3
For the function $$\phi = a{x^2}y - {y^3}$$ to represent the velocity potential of an ideal fluid, $${\nabla ^2}\,\,\phi $$ should be equal to zero. In that case, the value of $$'a'$$ has to be
A
$$-1$$
B
$$1$$
C
$$-3$$
D
$$3$$
3
GATE CE 1999
MCQ (Single Correct Answer)
+1
-0.3
Limit of the function, $$\mathop {Lim}\limits_{n \to \infty } {n \over {\sqrt {{n^2} + n} }}$$ is _______.
A
$${1 \over 2}$$
B
$$0$$
C
$$\infty $$
D
$$1$$
4
GATE CE 1999
MCQ (Single Correct Answer)
+1
-0.3
Number of inflection points for the curve $$\,\,\,y = x + 2{x^4}\,\,\,\,$$ is_______.
A
$$3$$
B
$$1$$
C
$$n$$
D
$${\left( {n + 1} \right)^2}$$
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