Continuity and Differentiability

Let [t] denote the greatest integer less than or equal to t. Let f : [0, ) R be a function defined by f(x) = [ x2 + 3 ] - [ x]. Let S be the set of all points in the interval [0, 8] at which f is not continuous. Then a S a is equal to .

Let f(x) = x5 + 2x3 + 3x + 1, x R, and g(x) be a function such that g(f(x)) = x for all x R. Then g(7)g'(7) is equal to :

1. 42
2. 7
3. 1
4. 14

If the function f(x) = 3x + x - 3xx3, x R, is continuous at x = 0, then f(0) is equal to :

1. 4
2. -2
3. -4
4. 2

If y( ) = 2 + 2 3 + 4 2 + 5 + 2, then at = 2, y'' + y' + y is equal to :

1. 12
2. 1
3. 32
4. 2

Let f : [-1, 2] R be given by f(x) = 2x2 + x + [x2 ] - [x], where [t] denotes the greatest integer less than or equal to t. The number of points, where f is not continuous, is :

1. 5
2. 6
3. 4
4. 3

Let f(x)=x5+2ex / 4 for all x R. Consider a function g(x) such that (g f)(x)=x for all x R. Then the value of 8 g (2) is :

1. 4
2. 2
3. 16
4. 8

Let f:R be a function given by f(x)= cases 1- 2xx2, & x<0\ , & x=0,\ 1- xx, & x>0 cases where , . If f is continuous at x=0, then 2+ 2 is equal to :

1. 48
2. 6
3. 3
4. 12

If the function f(x) = cases 72x - 9x - 8x + 1 2 - 1 + x, & x 0 \ a e 2 e 3, & x = 0 cases is continuous at x = 0, then the value of a2 is equal to

1. 968
2. 1250
3. 1152
4. 746

Let f:R be defined as : f(x)= cases a-b 2xx2; & x<0\ x2+cx+2; & 0 x 1\ 2x+1; & x>1 cases If f is continuous everywhere in R and m is the number of points where f is NOT differentiable then m+a+b+c equals :

1. 1
2. 4
3. 3
4. 2

Let f(x)= |2 x2+5|x|-3 |, x R. If m and n denote the number of points where f is not continuous and not differentiable respectively, then m+n is equal to :

1. 5
2. 3
3. 2
4. 0