Value of $2xy$ when $x=4$ and $y=0$ is _________.

Q. The value of $x$ in $lo{g}_2(x+2)=3$ is

Q.

Question 8

The value of y for which the expressions (y - 15) and (2y + 1) become equal is

(a) 0

(b) 16

(c) 8

(d) - 16

Q. The equation of the parabola with focus (0, 0) and directrix x + y = 4 is
(a) x² + y² − 2xy + 8x + 8y − 16 = 0
(b) x² + y² − 2xy + 8x + 8y = 0
(c) x² + y² + 8x + 8y − 16 = 0
(d) x² − y² + 8x + 8y − 16 = 0

Q. The value of $\underset{0}{\overset{2\mathrm{\pi }}{\int }}\sqrt{1+\sin \frac{x}{2}}dx$ is
(a) 0
(b) 2
(c) 8
(d) 4

Q.

Value of $2xy$ when $x=4$ and $y=0$ is _________.