Question

$(12)^{-2} + (13)^{-2} + (14)^{-2}$

Answer 1

Step-by-step explanation:

$(12)^{ - 2} + {(13)}^{ - 2} + {(14)}^{ - 2}$

$\frac{1}{( {12})^{2} } + \frac{1}{(13)^{2} } + \frac{1}{(14)^{2} }$

$\frac{1}{144} + \frac{1}{169} + \frac{1}{196}$

$0.00694+0.00591+0.00510$

$0.01795$

I hope it is helpful