2^3.30-[2^2.19-(3^4-3^2)].50
ai giup mik voi
1.
26/3 .................
2.
19/8 ..............
3.
30/4 ..............
4.
22/12 ..........
5.
2/9 ............
3/4+1/2+(-3/32) quy dong giup mik voi
\(\dfrac{3}{4}+\dfrac{1}{2}+\left(\dfrac{-3}{32}\right)=\\ \dfrac{24}{32}+\dfrac{16}{32}+\left(\dfrac{-3}{32}\right)\\ =\dfrac{37}{32}\)
(2x-2^4).6^3=2.6^4
giup mik voi ,mik ko biet lam!!??????
\(\left(2x-2^4\right).6^3=2.6^4\)
\(\Rightarrow2x-2^4=2.6^4:6^3\)
\(\Rightarrow2x-2^4=2.6=12\)
\(\Rightarrow2x=12+16=28\)
\(\Rightarrow x=28:2=14\)
giup mik voi. ai giup mik mik se tik diem cho
N=(2/3)^5.(-27/8)^2.729 tất cả trên (3/2)^4 .216
p= 2.8^4.27^2+4.6^9 tất cả trên 2^7.6^7 + 2^7.40.9^4
Q= (2/3)^3.(-3/4)^2.(-1)^5 / (2/5)^2 . (-5/12)^3
x^3-4x^2+4-x=0
giup mik voi
<=> x3 - 4x2 - x + 4 = 0
<=> (x2 - 1)(x - 4) = 0
<=> (x - 1)(x + 1)(x - 4) = 0
<=> x = 1 hoặc x = -1 hoặc x = 4
\(x^3-4x^2+4-x=0\)
\(\left(x-1\right)\left(x-4\right)\left(x+1\right)=0\)
\(x=\pm1;x=4\)
sắp tới lập nhóm nha :v ( quảng cáo lun )
giup mik voi\(1\frac{1}{5}+2\frac{2}{7}+3\frac{4}{5}+4\frac{5}{7}\)
mấy bạn tinh giup mik bai nay voi
100-99+98-97.....+4-3+2-1
100 - 99 + 98 - 97 ...... + 4 - 3 +2 - 1
= ( 100 - 99) + ( 98 - 97) + ( 96 - 95) +.....( 4 - 3) + ( 2 - 1)
= 1 + 1 + ....+1 + 1 ( 50 số 1 ) = 50
tick đúng cho mình nha ^_^
= (100 - 99 ) + ( 98 - + 97 ) + . . . + ( 4 - 3 ) + ( 2 - 1 )
= 1 + 1 + . . . + 1 + 1
50 số hạng
= 1 x 50 = 50
100 + 98 + 96 + ....... + 2 - 97 - 95 - ...... - 3 - 1
= ( 100 + 98 + ...... + 2 ) - ( 97 + 95 + .......+ 3 + 1 )
= [ ( 2 + 100 ) x 50 : 2 ] - [ ( 1 + 97 ) x 49 : 2 ]
= 2550 - 2401
= 149
Giup mik voi mik dg gap!
2023 - 2022 + 2021 - 2020 + ... + 3 - 2 + 1\(...=1+1+...+1+1\)
Số số 1 là :
\(\left(2022-2\right):2+1+1=1012\left(số\right)\)
Vậy kết quả là \(1x1012=1012\)
3+(x-5)=2(3x-2)
Giup mik voi
3 + x - 5 = 6x -4
3 - 5 + 4 = 6x -x
2 = 5x
x = 2 / 5
\(3+\left(x-5\right)=2\left(3x-2\right)\)
\(3+x-5=6x-4\)
\(x-6x=-4+5-3\)
\(-5x=-2\)
\(x=\frac{2}{5}\)
3 + ( x - 5 ) = 2 ( 3x - 2 )
3 + ( x - 5 ) = 2 . 3x - 2. 2
3 + x + ( -5 ) = 6x - 4
3 + ( -5 ) + x = 6x - 4
-2 + x = 6x - 4
- 6x + x = 2 - 4
- 5 x = -2
x = -2 : ( -5 )
x = 0,4