Làm full nha.thanks!

Question

Làm full nha.thanks!
lam-full-nha-thanks

in progress 0
Calantha 1 year 2020-11-04T09:35:33+00:00 2 Answers 51 views 0

Answers ( )

  1. Eirian
    0
    2020-11-04T09:37:10+00:00
    Reply

    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

     

  2. Delwyn
    0
    2020-11-04T09:37:12+00:00
    Reply

    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!!!

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )