Question

\(\frac{21^4}{27.\left(-343\right)}+7\)

Answer 1

\(=\frac{\left(3.7\right)^4}{3^3.\left(-7\right)^3}+7\)

\(=\frac{3^4.7^4}{3^3.\left(-7\right)^3}+7\)

=\(\) 3.(-7)+7

= -14

Answer 2

\(\frac{21^4}{27.\left(-343\right)}+7\)

=> \(\frac{\left(3.7\right)^4}{3^3.\left(-7\right)^3}+7=>\frac{3^3.3.7^3.7}{3^3.\left(-7\right)^3}+7\)

=> 3 . (-7) + 7

= -21 + 7 = -14

Answer 3

\(\frac{21^4}{27.\left(-343\right)}+7\)

= \(\frac{\left(3.7\right)^4}{3^3.\left(-7\right)^3}+7\)

= \(\frac{3^4.7^4}{3^3.\left(-7\right)^3}+7\)

= 3.(-7) + 7

= (-21) + 7

= -14.

Chúc bạn học tốt!