" (l) "2^(x+1)+4^(x)=8

If (2^x)/( 1+ 2^x ) = (1)/(4) , then find the value of (8^x)/( 1+ 8^x) .

(2^(x-1)*4^(x+1))/(8^(x-1))=16

If 2^(x)=4^(y)=8^(z) and (1)/(2x)+(1)/(4y)+(1)/(8z)=4 find the value of x.

Test the following functions for continuity (1 ) (2x^(5) - 8x^(2) + 11)/(x^(4) + 4x^(2) + 8x^(2) + 8x+4) (2) f(x) = (3 sin^(3)x + cos^(2)x+1)/(4cosx-2)

Find the value of : ( x^(1/2 ) + x^(-1/2 ) ) times ( x^(1/4 ) + x^(-1/4 ) ) times ( x^(1/8 ) + x^(-1/8 ) ) times ( x^(1/8 ) - x^(-1/8 ) ) ( a ) x + 1/x ( b ) ( x^2 -1 )/x

The expression (1)/(x-1)-(1)/(x+1)-(2)/(x^(2)+1)-(4)/(x^(4)+1) is equal to (8)/(x^(8)+1)( b) (8)/(x^(8)-1)( c) (8)/(x^(7)-1) (d) (8)/(x^(7)+1)