тìм x ʙιếт :
α) 697 : \(\frac{\text{15.2 + 364}}{x}\)= 17
ɓ) 1 + 2 + 3 + ..........+ 2020
c) 2 + 4 + 6 +...........+2024
ʟàм ԍιúᴘ мικ cả 3 ᴘнầɴ ɴнé , мικ sẽ cнọɴ câu тʀả ʟờι đúɴԍ ɴнấт để тιcκ ɴнé ^^
|x|=1+2+3+4+5+...+2010 tìm x
2mũ x=2+4+6+8+10+...+2010 tìm x
697:15a+364/a=17 tìm a
\(\left|x\right|=1+2+3+...+2010\)
\(\left|x\right|=\frac{\left(2010+1\right).2010}{2}\)
\(\left|x\right|=2011.1005\)
\(\left|x\right|=2021055\)
\(x=\pm2021055\)
\(2^x=2+4+6+...+2010\)
\(2^x=\frac{\left(2010+2\right).1005}{2}\)
\(2^x=1006.1005\)
\(x=\frac{log\left(1011030\right)}{log\left(2\right)}\)(Nguồn: wolframalpha)
\(697\div15a+\frac{364}{a}=17\)
\(\frac{697}{15a}+\frac{5460}{15a}=17\)
\(6157=17.15a\)
\(6197=255a\)
\(a=\frac{6197}{255}\)
tính:
3x + 42 = 196 : ( 193 . 192 ) - 3 . 12018
697 : [( 15 . x + 364 ) : x ] = 17
3x + 42 = 196 : ( 193 . 192 ) - 3 . 12018
3x + 42 = 196 : 195 - 3 . 1
3x + 42 = 19 - 3
3x + 42 = 17
3x + 16 = 17
3x = 17 - 16
3x = 1
\(\Rightarrow\) x = 0.
1 tính
1+2-3-4+5+6-7-8+......-299-30+301+302
2 tìm x
697:[ (15X+364) : X ]=17
X+5:2-(32+16*3:16-15)+0
tính:
3x + 42 = 196 : ( 193 . 192 ) - 3 . 12018
697 : [( 15 . x + 364 ) : x ] = 17
1, [(10-x). 2+5 ] : 3-2 = 3
2, 697: [(15x+364):x ] = 17
1/ =>[ (10 - x) . 2 + 5 ] : 3 = 5
=> (10 - x) .2 + 5 = 15
=> (10 - x) . 2 = 10
=> 10 - x = 5
=> x = 5
2/ => (15x + 364) : x = 41
=> 15x + 364 = 41x
=> 26x = 364
=> x = 14
tính nhanh
B=1+2-3-4+5+6-7-8+9+10-11-12+....-111-112+113+114
tìm x
697:[(15x+364):x]=17
a: B=(1+2-3-4)+(5+6-7-8)+...+(109+110-111-112)+227
=(-4)+(-4)+...+(-4)+227
=-112+227=115
b: =>(15x+364):x=41
=>15x+364=41x
=>-26x=-364
=>x=14
tính nhanh
B=1+2-3-4+5+6-7-8+9+10-11-12+....-111-112+113+114
tìm x
697:[(15x+364):x]=17
mk cần gấp
Bài 1:
B = 1+2-3-4 + 5 + 6-7-8 + 9+10-11-12+...+110-111-112+113+114
B = 1 + (-5) + 5 + 9 + (-13)+...+ (-113) + 113 + 114
B = 1 + 114
B = 115
Bài 2:
697 : [(15x+364) : x ] = 17
(15x+364) . 1/x = 697 : 17
(15x+364) . 1/x = 41
15x. 1/x + 364.1/x = 41
15 + 364/x = 41
364/ x = 41-15
364/x = 26
x = 364 : 26
x = 14
Ta sẽ nhóm 4 số với nhau
B=(1+2-3-4)+(5+6-7-8)+(9+10-11-12)+...+(109+110-111-112)+113+114
B=-4+(-4)+(-4)+...+(-4)+113+114 (Có 28 thừa số -4)
B=-4*28+113+114
Giải tiếp bên dưới hồi nãy ấn nhầm:
B=-112+113+114
B=115
Bài 2
697:[(15X+364):X]=17
(15X+364)x1/X=697:17
(15X+364)x1/X=41
15Xx1/X+364x1/X=41
15+364/X=41
364/X=41-15
364/X=26
X=364/26
X=14
32x - 1 - 23 = 19
\(697:\frac{15.x+364}{x}=17\)
\(92.4-27=\frac{x+350}{x}+315\)
Nhớ ghi cách làm ra nha
Bài 1: Tìm X biết:
1) [ ( X + 32 ) - 17 ] x 2 = 42
2) ( 12000 + X ) : 376 = X
3) 697 : 15X + 364 / X = 17
4) 1+ 2+ 3+ ......... + X = 55
5) ( X + 1) + ( X + 2 ) + ...... ( X + 30) = 795
(12000+X):376=X
12000+X=376 x X
12000=376 x X - X
12000=375 x X
X=12000:375= 32