Các câu hỏi tương tự
1+2+3+4+5+6+...+10000000
hãy tính kết quả này
Tìm x:
a,\(15-\left(5-2x\right)=-4\)
b,\(\left|x-3\right|+1=4\)
c,\(5^x\cdot5^{x+1}\cdot5^{x+2}=10000000\div2^{18}\)
TÍNH TỔNG : 1+(-2)+3+(-4)+...+(-10000000)
LÀM ĐÚNG MK TICH CHO
CMR: 1=2=3=.....=10000000
Chứng minh rằng:a) A1/2+2/2^2+3/2^3+4/4^4+...+100/3^1002b) B1/3+2/3^2+3/3^3+...+100/3^1003/4c) C1/2^3+1/3^3+1/4^3+...+1/n^31/4 (n thuộc N; n hoặc 2)d) D1/3^3+1/4^3+1/5^3+...+1/n^31/12 (n thuộc N; n hoặc 3)e) E2/1*4/3*6/5*...*200/19920f) F3/4+5/56+7/144+...+2n+1/n^2+(n+1)^2 ( n nguyên dương)g) G1/2*(1/6+1/24+1/60+...+1/9240)57/62h) H1/31+1/32+1/33+...+1/20483i) I(1-1/3)*(1-1/6)*(1-1/10)*...*(1-1/253)2/5j) J1/2!+2/3!+3/4!+...+n-1/n!2k) K1/2!+5/3!+11/4!+...+n^2+n-1/(n+1)!2 (n nguyên dương)l) 1/6L1...
Đọc tiếp
Chứng minh rằng:
a) A=1/2+2/2^2+3/2^3+4/4^4+...+100/3^100<2
b) B=1/3+2/3^2+3/3^3+...+100/3^100<3/4
c) C=1/2^3+1/3^3+1/4^3+...+1/n^3<1/4 (n thuộc N; n> hoặc = 2)
d) D=1/3^3+1/4^3+1/5^3+...+1/n^3<1/12 (n thuộc N; n> hoặc =3)
e) E=2/1*4/3*6/5*...*200/199<20
f) F=3/4+5/56+7/144+...+2n+1/n^2+(n+1)^2 ( n nguyên dương)
g) G=1/2*(1/6+1/24+1/60+...+1/9240)>57/62
h) H=1/31+1/32+1/33+...+1/2048>3
i) I=(1-1/3)*(1-1/6)*(1-1/10)*...*(1-1/253)<2/5
j) J=1/2!+2/3!+3/4!+...+n-1/n!<2
k) K=1/2!+5/3!+11/4!+...+n^2+n-1/(n+1)!<2 (n nguyên dương)
l) 1/6<L=1/5^2+1/6^2+1/7^2+...+1/100^2<1/4
Chứng minh rằng:a) A1/2^2+1/3^2+1/4^2+...+1/2010^21b) B1/2+2/2^2+3/2^3+...+100/2^1002c) C1/3+2/3^2+3/3^3+...+100/3^1003/4d) D1/2^3+1/3^3+1/4^3+...+1/n^31/4 (n€ N;n hoặc 3)e) E1/3^3+1/4^3+1/5^3+...+1/n^31/12 (n€N; n hoặc 3)f) F2/1*4/3*6/5*...*200/19920g) G3/4+5/36+7/144+...+2n+1/n^2*(n+1)^21 (n nguyên dương)h) H1/2*(1/6+1/24+1/60+...+1/9240)57/462i) I1/31+1/32+1/33+...+1/20483j) J(1-1/3)*(1-1/6)*(1-1/10)*...*(1-1/253)2/5k) K1/2!+2/3!+3/4!+...+n-1/n! (n€N;n hoặc 2)l) L1/2!+5/3!+11/4!+...+n^2+n-...
Đọc tiếp
Chứng minh rằng:
a) A=1/2^2+1/3^2+1/4^2+...+1/2010^2<1
b) B=1/2+2/2^2+3/2^3+...+100/2^100<2
c) C=1/3+2/3^2+3/3^3+...+100/3^100<3/4
d) D=1/2^3+1/3^3+1/4^3+...+1/n^3<1/4 (n€ N;n> hoặc = 3)
e) E=1/3^3+1/4^3+1/5^3+...+1/n^3<1/12 (n€N; n> hoặc = 3)
f) F=2/1*4/3*6/5*...*200/199<20
g) G=3/4+5/36+7/144+...+2n+1/n^2*(n+1)^2<1 (n nguyên dương)
h) H=1/2*(1/6+1/24+1/60+...+1/9240)>57/462
i) I=1/31+1/32+1/33+...+1/2048>3
j) J=(1-1/3)*(1-1/6)*(1-1/10)*...*(1-1/253)<2/5
k) K=1/2!+2/3!+3/4!+...+n-1/n! (n€N;n> hoặc = 2)
l) L=1/2!+5/3!+11/4!+...+n^2+n-1/(n+1)!<2
m) 1/6M=1/5^2+1/6^2+1/7^2+...+1/100^2<1/4
tìm các số nguyên m,n biết: a) m/3 - 4/n = 1/5
b) 4/m + n/3 = 5/6
c) 5/m - n/3 = 1/6
d) m/6 - 2/n = 1/30
cho n là số tự nhiên. chứng minh A=1/5^2+2/5^3+3/5^4+4/5^5+5/5^6+....+n/5^n+1+......+11/5^12<1/16
Tinh nhanh:
m)5^1+5^2+5^3+...+5^199+5^200
n)3^0-3^2+3^3-3^4+...+3^2017-3^2018+3^2019-3^2020
o)6+6*9+6*9^2+6*9^3+...+6*9^99
p)(-1)*(-1^2)*(-1^3)*(-1^4)*...*(-1^99)*-(1^100)
Giup minh nhe!