" v) "25x^(2)+(10)/(9)x+(1)/(81)

(a) Factorise : 9x^(2) - 24 xy + 16y^(2) (b) Factorise : 25x^(2) + (1)/(25x^(2)) + 2

f(x)=x^(4)-25x^(2) k(x)=(1)/(x^(3)+3x^(2)-10x) Which of the following expressions is equivalent to f(x) . k(x),for xgt2 ?

sqrt((25)/(81)-(1)/(9))=?(2)/(3)( b) (4)/(9)( c) (16)/(81) (d) (25)/(81)

If y = tan ^(-1) ((2x)/( 1+15x^(2)) ) , and (dy)/(dx) = ( lambda)/( 1+25x^(2)) -( mu)/( 1+9x^(2)) ," then " lambda + mu equal

If x^((1)/(4)) + x^((-1)/(4))=2 , then what is the value of x^(81) + ((1)/(x^(81))) ?

[{(-1/3)^2}^(-2)]^(-1) = (a) 1/(81) (b) 1/9 (c) -1/(81) (d) -1/9

[{(-1/3)^2}^(-2)]^(-1) = (a) 1/(81) (b) 1/9 (c) -1/(81) (d) -1/9