Chung minh rang moi phan so dang n+1/2n+3 ( n thuoc N ) deu la phan so toi gian.
Chung to rang phan so sau toi gian voi moi n thuộc N
2n+1/2n(n+1)
Lam on do ai lam dc minh cho 6 tich
Chung to rang phan so sau toi gian voi mọi n thuộc N
2n+1/2n(n+1)
chung to phan so toi gian voi n thuoc n a , n+1/2n+3 b, 2n +3 /4n +8
chung minh rang moi phan so sau toi gian voi moi so tu nhien n:
a.n+1/2n+3 b.2n+3/4n+8
chung to phan so toi gian voi n thuoc N
a,A=n+1/2n+3
b,B=2x+1/x-3
cac ban giup minh voi
cach lam bai : chung to rang moi phan so co dang n+2015/n+2016 ( voi n thuoc N ) deu la phan so toi gian
Chứng minh rang phan so sau toi gian voi moi n thuộc N
2n+1/2n(n+1)
Lam dung va nhanh nht minh cho 3 tick
Lam dung va nhanh nhi mink cho 2 tich
......................... .......ba mình k cho 1 tick
chung to rang vs moi so tu nhien n , phan so n^3+2n/n^4+3n^2+1 la toi gian