If `10^(2y)=\ 25\ ,` then `10^(-y)` equals `-1/5` (b) `1/(50)` (c) `1/(625)` (d) `1/5`

If 10^(2y)=\ 25\ , then 10^(-y) equals (a) -1/5 (b) 1/(50) (c) 1/(625) (d) 1/5

If xdy=ydx+y^2dy and y(1)=1 , then y(-3) is equal to (A) 1 (B) 5 (C) 4 (D) 3

If xdy=ydx+y^2dy and y(1)=1 , then y(-3) is equal to (A) 1 (B) 5 (C) 4 (D) 3

If [(2x+y,0),(5,x)] = [(5,0),(5,3)] then y is equal to (a) 1 (b) 3 (c) 2 (d) -1

If y= (x)/((x+5)) , then (dx)/(dy) equals- (A) (5)/((1-y)^(2)) (B) (5)/((1+y)^(2)) (C) (1)/((1-y)^(2)) (D) None of these

If sqrt(5^n)=125 , then 5^(root(n)64 )= (a) 25 (b) 1/(125) (c) 625 (d) 1/5

If y = Ae^(5x) + Be^(-5x) , then (d^2y)/(dx^2) is equal to : (a) 25y (b) 5y (c) -25y (d) 15y

1.04 as an improper fraction is (a) 1 1/5 (b) 1 2/5 (c) 1 1/(25) (d) 1 2/(25)

If a=-2 , b=-1 ,then a^(b)-b^(a) is equal to a) -1 b) 0.5 c) -2 d) -1.5

If y=tan^(-1)((4x)/(1+5x^(2)))+tan^(-1)((2+3x)/(3-2x)) , then (dy)/(dx) is equal to a) (5)/(1+25x^(2)) b) (1)/(1+25x^(2)) c)0 d) (5)/(1-25x^(2))