21/4 . 41/8 . 81/16 . 161/32 ... is equal to
1
2
B.
2
Given, 21/4 . 41/8 . 81/16 . 161/32 ...
= 21/4 . 22/8 . 23/16 . 24/32 ...
=
= 2S
where S =
On subtracting Eq. (ii) from (i), we get
Thus, required sum = 2S = 21 = 2
The locus of the points z which satisfy the condition
a straight line
a circle
a parabola
None of the above
The sides of triangle are in the ratio 1 : √3 : 2, then the angles of the triangle are in ratio
1 : 3 : 5
2 : 3 : 1
3 : 2 : 1
1 : 2 : 3
A particle moves along a straight line according to the laws = 16- 2t + 3t, where s metres is the distance of the particle from a fixed point at the end of t seconds. The acceleration of the particle at the end of 2s is
36m/s2
34m/s2
36m
None of these