if f(x) = -1+mod (x-2), 0<=x<=4

and g(x) = 2 - mod x, -1<=x<=3

then fog(x) is continuous for x belonging to

a [0,4]

b [-1,3]

c [0,3]

d [-1,2]

the diameter of a roller is 84 cm and its length is 120 cm. it takes 500 complete revolution to  move once over to level a playground. find the area of the playground in square m?

Find dy/DX when y=x^sinx+sin-1√x.

 

Please give me the solution of this problem. 

Solve the differential equation y’’+2ty’-4y=1, y(0)=y’(0)=0.