Find the value of [ -1. 9 ] is :
( A ) 2
( B ) -2
( C ) - 1
( D ) 1. 9

Find the value of: ( -1/9 )^(-1/2 )

Find the value of (1/9)^(-1/2)

Find the value of ( 2.bar 6 - 0.bar 9 ) is ( a ) 4/3 ( b ) 1 /3 ( c ) 5/3

Find the value of ( 1 5/9 ) times ( -3 3/8 ) ÷ ( - 7 times 3/4 ) is ( a ) 1/2 ( b ) -1/2 ( c ) 1 ( d ) -1

Find the value of (-2)times(-1) (a) 2 (b) -2 (c) -1 (d) 1

Find the value of (-9/5 +( -8/5 ) ÷ 5/2 times (-5/4 ) ) (a) -1 (b) -3 (c) 2 (d) -8

Find the value of (2/3)^2 a) 4/9 b) 9/4 c) -2/9 d)0

Find the value of b^(2) - 4ac , if (i) a= 3,b= 9 , c = 6 (ii) a= 2, b = - 8 , c = 8 (iii) a= 1, b = 1 , c = 1 .

If (1-tan^(2)36^(@))/(2)=sqrt(a)-sqrt(b) ,then the value of (a+b) is equal to (a,b in N) (A)5 (B) 9 (C) 7 (D)None of these

Find the value of : ((3.9)^2-(1.7)^2)/(3.9-1.7)