The rates of coling of a body at tempeerature `100^(@)C` and `80^(@)C` are `x_(1)` and `x_(2)` respectively, when placed in a room of tmpeerature `40^(@)C` then `(x_(1))/(x_(2))` is .

The rates of cooling of a body at temperatures 100^(@)C and 80^(@) are x_(1) and x_(2) respectively, when placed in a room of temperature 40^(@)C then (x_(1))/(x_(2)) is

Consider two hot bodies B_(1) and B_(2) which have temperature 100^(@)"C" and 80^(@)"C" respectively at t = 0. The temperature of surroundings is 40^(@)" C" . The ratio of the respective rates of cooling R_(1) and R_(2) of these two bodies at t = 0 will be

Consider two hot bodies B_(1) and B_(2) which have temperature 100^(@)"C" and 80^(@)"C" respectively at t = 0. The temperature of surroundings is 40^(@)" C" . The ratio of the respective rates of cooling R_(1) and R_(2) of these two bodies at t = 0 will be

Consider two hot bodies B_(1) and B_(2) which have temperature 100^(@)"C" and 80^(@)"C" respectively at t = 0. The temperature of surroundings is 40^(@)" C" . The ratio of the respective rates of cooling R_(1) and R_(2) of these two bodies at t = 0 will be

Given C(x)=x^(2)+2x+1 , then C'(x) is

If x_(1) and x_(2) are two distinct roots of the equation a cos x+b sin x=c, then tan((x_(1)+x_(2))/(2)) is equal to (a)(a)/(b) (b) (b)/(a) (c) (c)/(a) (d) (a)/(c)

If a,b, and c are in G.P.and x and y respectively,be arithmetic means between a,b, and b,c, then (a)/(x)+(c)/(y)=2b(a)/(x)+(c)/(y)=(c)/(a) c.(1)/(x)+(1)/(y)=(2)/(b) d.(1)/(x)+(1)/(y)=(2)/(ac)

Coefficient of x^(5) in (1+x^(2))^(5)(1+x)^(4) is: (A) 60(B)80(C)90(D)100