`[((1)/(3))^(-1)+((1)/(4))^(-1)]^(-1)=`

The value of [(1)/(3)]^(-1)-((1)/(4))^(-7)}+[((1)/(4))^(-1)-((1)/(5))^(-1)]+[((1)/(5))^(-1)-((1)/(6))^(-1)]^(2)] is

Find the values of - ((1)/(2))^(-1)+((1)/(3))^(-1)+((1)/(4))^(-1)

(4^(-1)-3^(-1))^(-1)+(2^(-1)-3^(-1))^(-1)=((1)/(4)-(1)/(3))^(-1)+((1)/(2)-(1)/(3))^(-1)

Evaluate {(frac(1)(3))^-1 - (frac(1)(4))^-1}^-1

The product of the 9 fractions (1-(1)/(2))(1-(1)/(3))(1-(1)/(4))dots(1-(1)/(10))=

What is the value of the following? (1-(1)/(2))(1-(1)/(3))(1-(1)/(4))dots(1-(1)/(n-1))(1-(1)/(n))

Express each of the following as a rational number of the form p/q : (2^(-1)+3^(-1))^2 (ii) (2^(-1)-4^(-1))^2 ] {(3/4)^(-1)-(1/4)^(-1)}^(-1)

The value of (7^(-1)-8^(-1))^(-1)-(3^(-1)-4^(-1))^(-1) is

11.The value of (7^(-1)-8^(-1))^(-1)-(3^(-1)-4^(-1))^(-1) is :