Question

2.
find : (7‐¹ + 8‐¹)‐¹ -(3‐¹– 4-¹)‐¹​

Answer 1

Answer:

Answer. ∴ 25 numbers lie in between.

Answer 2

Answer:

$\frac{212}{105}$

Step-by-step explanation

$(7^{-1} + 8^{-1} )^{-1}$ = 1 ÷ ( $\frac{1}{7}$ + $\frac{1}{8}$  )

                       = $\frac{56}{15}$

$(3^{-1} + 4^{-1} )^{-1}$  =  1 ÷ ( $\frac{1}{3}$ + $\frac{1}{4}$  )

                      = $\frac{12}{7}$

$\frac{56}{15}$ - $\frac{12}{7}$ =  $\frac{212}{105}$