giúp mik với mik xin mn đó:(((((((((

Đáp án:

Giải thích các bước giải:

 a, 2^7.9^3/6^5.8^2

=2^7.(3^2)^3/(2.3)^5.(2^3)^2

=2^7.3^6/2^5.3^5.2^6

= 3/2^4

=3/16

b, 2^15.9^4/6^6.8^3

=2^15.(3^2)^4/(2.3)^6.(2^3)^3

=2^15.3^8/2^6.3^6.2^9

=3^2=9

c,9^2.2^11/16^2.6^3

=(3^2)^2.2^11/(2^4)^2.(2.3)^3

=3^4.2^11/2^8.2^3.3^3

=3

d, 5^4.20^4/25^5.4^5

=5^4.(5.4)^4/(5^2)^5.4^5

=5^4.5^4.4^4/5^10.4^5

=1/100