1.

Simplify: (1/2)^-2 + (2/3)^-2 + (3/4)^-2

Answer»

ANSWER:

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

=3^-2+5^-2+7^-2

=1/3^2+1/5^2+1/7^2

=1225+441+225/11025

=1891/11025

=0.171519247



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