Question

simplify: (1/3)power-2+(1/5)power -2 +(1/7)power -2
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Answer 1

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${\frac{1}{3}}^{ - 2} + {\frac{ {1} }{5}}^{ - 2} + { \frac{1}{7} }^{ - 2}$

$\huge\bf\blue{Answer}$

${3}^{2} + {5}^{2} + {7}^{2}$

$9 + 25 + 49$

$83$

Note :-

as the power is in negative form we have to change it in positive so we have to reversed the number which is in fraction form

Ex. if there is

${\frac{ 2}{3}}^{ - 2}$

then we have to change it in positive ,if we convert it in positive we get

${\frac{3}{2}}^{2}$