Question

aflați valoarea expresiei:
$(\frac{1}{3} ) ^{ - 1} + ( \frac{1}{3} ) ^{ - 2}$
$( - 2) ^{ - 2} + ( \frac{1}{2} ) ^{ - 3} + ( \frac{1}{7} ) ^{0}$
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Answer 1

Răspuns:

$(\frac{1}{3}) ^{ - 1} + ( \frac{1}{3} ) {}^{ - 2} = \\ (3) {}^{ 1} + (3) {}^{ 2} = \\ 3 + 9 = 12 \\ \\ ( - 2) {}^{ - 2} + ( \frac{1}{2} ) {}^{ - 3 } + ( \frac{1}{7} ) {}^{0} = \\ ( \frac{1}{2} ) {}^{ 2} + (2) {}^{3} + 1 = \\ \frac{1}{4} + 8 + 1 = \frac{37}{4}$

sper că te-am ajutat!!!!!