Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Tìm số nguyên x, biết: $2^{x+3}$ . $4^{2}$ = $2^{5}$

Toán Lớp 6: Tìm số nguyên x, biết:
$2^{x+3}$ . $4^{2}$ = $2^{5}$

Comments ( 2 )

  1. $2^{x+3}$ .$4^{2}$ =$2^{5}$
    <=> $2^{x}$ .$2^{3}$ .$4^{2}$ =$2^{5}$ 
    <=> $2^{x}$.8.16=32
    <=> $2^{x}$.128 = 32
    <=> $2^{x}$ = $\frac{1}{4}$ 
    <=> x = -2
    Vậy x=-2

  2. Giải đáp:
    2^[x + 3] xx 4^2 = 2^5
     -> 2^[x + 3] xx 16 = 32
    -> 2^[x + 3] = 32 : 16
    -> 2^[x + 3] = 2
    -> 2^[x + 3] = 2^1
    -> x + 3 = 1
    -> x = 1 – 3
    -> x = -2
    Vậy x = -2
    #dariana

Leave a reply

222-9+11+12:2*14+14 = ? ( )

About Khanh