If f(x)=`x^(5)-20x^(3)`+240x, then f(x) satisfies which of the following

f(x)=10x^(2)-20x+5

f(x)=x^(5)-20x^(3)+240x, then f(x) is O Monotonically decreasing everywhere O Monotonically decreasing on (0,oo) O Monotonically increasing on (-oo,0) O Monotonically increasing everywhere

If f(2x+3y,2x-7y)=20x, then f(x,y) equals

If f(2x+3y,2x-7y)=20x, then f(x,y) equals:

If f(2x+3y,2x-7y)=20x , then f(x,y) equals

If f(2x+3y, 2x-7y)=20x, then f(x,y) equals :

If f(2x+3y, 2x-7y)=20x, then f(x,y) equals :

If f(2x+3y, 2x-7y)=20x , then f(x, y) equals

If f(2x+3y, 2x-7y)=20x, then f(x,y) equals :

If f(x)=x^2-3x+4, then the value of x which satisfy the relation f(x) = f(2x+1) are___