Làm full nha.thanks! Question Làm full nha.thanks! in progress 0 Môn Toán Calantha 1 year 2020-11-04T09:35:33+00:00 2020-11-04T09:35:33+00:00 2 Answers 51 views 0
Answers ( )
1.
b) 25 = 5 mũ 2
e) 216 = 6 mũ 3
h) 81 = 9 mũ 2 = 3 mũ 4
c) 64 = 8 mũ 2 = 2 mũ 6
f) 36 = 6 mũ 2
k) 16 = 4 mũ 2 = 2 mũ 4
Chúc bạn học tốt.
mk chỉ biết vậy nên xin bạn đừng giận
Giải thích các bước giải:
$\text{Bài 1:}$
$b)25=5^2$
$e)216=$
$h)81=9^2=3^4$
$c)64=4^3=8^2$
$f)36=6^2$
$k)16=4^2=2^4$
$\text{Bài 2:}$
$D)125^4.25^3.5^{24}=(5^3)^4.(5^2)^3.5^{24}$
$=5^{12}.5^6.5^{24}$
$=5^{42}$
$E)25^3.125=(5^2)^3.5^3$
$=5^6.5^3$
$=5^9$
$H)a^3.a^9=a^{12}$
$K)(a^5)^7=a^{35}$
$\text{Bài 3:}$
$a)16^6:4^2=16^6:16=16^5$
$b)27^8:9^4=(3^3)^8:(3^2)^4=3^{24}:3^8=3^{16}$
$c)125^5:25^3=(5^3)^5:(5^2)^3=5^{15}:5^6=5^9$
$\text{Bài 4:}$
$a)2^x-15=113$
$⇔2^x=128$
$⇔2^x=2^7$
$⇔x=7$
$\text{Vậy $x=7$}$
$b)(7x-11)^3=2^5.5^2+200$
$⇔(7x-11)^3=1000$
$⇔(7x-11)^3=10^3$
$⇔7x-11=10$
$⇔7x=21$
$⇔x=3$
$\text{Vậy $x=3$}$
$c)(2x+1)^3=343$
$⇔(2x+1)^3=7^3$
$⇔2x+1=7$
$⇔2x=6$
$⇔x=3$
$\text{Vậy $x=3$}$
$d)720:[41-(2x-5)]=2^3.5$
$⇔720:(41-2x+5)=40$
$⇔41-2x+5=720:40=18$
$⇔-2x=18-46=-28$
$⇔x=14$
$\text{Vậy $x=14$}$
Học tốt!!!