*20*x^(4)+2x^(2)+9

The function f (x) = 2x ^(3) + 9x ^(2) + 12 x + 20 is :

The interval in which the function f(x) =2x^(3) + 9x^(2) + 12x + 20 is strictly increasing, is:

Irrational roots of the equaiton 2x^(4) + 9x^(3) + 8x^(2) + 9x + 2 = 0 are

Simplify (x+4)/(3x+4y) xx (9x^(2) - 16y^(2))/(2x^(2) +3x-20)

Factorise : (viii) 5x^(2) - (20x^4)/( 9)

(d^(20))/(dx^(20))(2cosxcos3x)= 2^(20)(cos2x-2^(20)cos4x) (b) 2^(20)(cos2x+2^(20)cos4x) (c) 2^(20)(sin2x+2^(20)sin4x) (d) 2^(20)(sin2x-2^(20)sin4x)