Let n be a positive even integer. If the ratio of the largest coefficient and the 2nd largest coefficient in the expansion of (1 + x)n is 11 : 10. Then, the number of terms in the expansion of (1 + x)n is
20
21
10
11
Five numbers are in AP with common difference 0. If the 1st, 3rd and 4th terms are in GP, then
the 5th term is always 0.
the 1st term is always 0.
the middle term is always 0
the middle term is always - 2.
The sum of series
is
B.
Given series is,
Let f : R R be such that f is injective and f(x) f(y) = f(x + y) for all x, y if f(x), f(y) and f(z) are in GP, then x, y and z are in
AP always
GP always
AP depending on the values of x, y and z
GP depending on the values of x, y and z
The area of the region bounded by the parabola y = x2 - 4x + 5 and the straight line y= x + l is
2
3
A line passing through the point of intersection of x + y = 4 and x - y = 2 makes an angle with the x-axis. It intersects the parabola y2 = 4(x - 3) at points (x1, y1) and (x2, y2) respectively. Then, is equal to