tim x thuoc n: 34.3^n :9=37
tim x thuoc n: 9<3^n<27
Tim chu so tan cung cua 360
hãy so sánh a=1+3+3^2+3^3+3^4+35+36 và B=37-1
Tính hợp lí các tổng sau:
1) 1+2+3+...+n
2) 2+4+6+...+2n
3) 1+3+5+7+...+(2n+1)
4) (125 x 37 x 32):4
5) 2 x 3 x 12 + 4 x 6 x 42 + 8 x 27 x 3
cau 1.tim x
a)15-|x-4|=6
b)-30+|25-x|=-1
c)x-(12-25)=-8
d) (x-29)-(17-38)=-9
cau 2.tim so nguyen x
a,22-(-x)=12
b,(x+5)+(x-9)=x+2
c,(27-x)+(15+x)=x-24
tim x
a) 3^x -4 =5^7 : 5^6
b ) 3^x-1 =27
c) (x-1) ^3 = 4(x-1)
d) 5^x 5^x-2= 130
ai giup mk nhanh nhat mk se tick cho 4 lan luon
tìm x biết
a) x + 37 = 50
b) 2.x-3=11
c) ( 2+x) : 5 = 6
d) 2 + : 5 = 6
e) x mũ chín = 25
g) x mũ ba-1=63
h) x mũ 2 + 17 =117
i) ( x+1) mũ 3 = 27
k) 130 - ( 5+x) mũ 2 = 81
Tìm x biết
d) 32%-0,25:x=-17/5
e)(x+1/5)^2+17/25=26/25
f)-32/27-(3x-7/9)^3=-24/27
g)60%x+0,4x+x:3=2
h)|20/9-x|=1/12+1/20+1/30+1/42+1/56+1/72
i)8/5+(2/7+2/17+2/37/5/7+5/17+5/37).x=16/5
Lưu ý: câu i 2/7+2/17+2/37 phần(vế trên) 5/7+5/17+5/37(vế dưới)
tìm x biết
1) 9-25=(7-x)-(25+7)
2) (27-514) -(486-73)+x=7
3) 25+5+37-25+6-29-x=37
4) 14+(-12)+x =10-/-15/+ /-3/
a) Tim x biet:
1/3 + 1/12 + 1/30 +...+ 2/x(x + 1) (x + 2)
b) Tinh:
(1 + 37) . (1 + 37/2) . (1 + 37/3)...(1 + 37/39)
(1 + 39) . (1 + 39/2) . (1 + 39/3)...(1 + 39/37)