giup mk voi cac ban: C
Cho A=7^58+2/7^57+2
B=7^57+2017/7^56+2017
So sanh A va B
giai nhanh giup mk nhe
dang can gap
mot o to chay tu tinh A den tinh B .Neu chay moi gio 60 km thi oto se den B luc 17 gio .Hoi:
a,2 tinh Ava B cach nhau bao nhieu km ?
b,O to phai chay voi van toc la bao nhieu de den B luc 16 gio ? cac ban co gang giup minh nhe ,minh can gap bay gio ,huhu
Tim a,b thuoc N
a)\(10^a+16^8=b^2\)
b)\(2^a+80=B^b\)
c)\(4^{15}.9^{15}< 2^a.3^a< 18^{16}.2^{16}\)
Cac ban giup mk voi
bai 1 tinh nhanh
a . 1/5x6 +1/6x7+ 1/7x8 + 1/8x9 +1/9x10
b . 1/1x2 + 1/2x3 + ....... + 1/99x100
c . 2/3x5 + 2/5x7 + 2/7x8 + 2/8x9
d . 2/3x5 + 2/5x7 + .......+ 2/98x100
bai 2 tinh hop li
9/13 + 14/6 + 1/9 + 4/6 + 7/13 + 17/19
bai 3 dien dau ( > , < , = )
a . 3/4 + 5/2 ....... 5/8 + 2 3/5 ( hon so )
B . 3 1/5 - 8/3 ......... 17/5 - 2 12/5 hon so
c . 2 4/9 + 18/7......... 22/9 + 2 4/7
giup mk nha cac ban , mai mk phai nop bai roi toi nay mk se lay y kien cua cac ban , giup mk nha
Tam giac ABC co AB =62 cm,chieu cao ung voi day AB =24 cm.Tren cac canh AB,BC,CA lan luot lay cac diem chinh giua cua chung la:M,N,P. Tim dien tich hinh tam giac.
Giup minh voi.Can gap.
Tim phan so toi gian biet khi cong ca tu va mau cua phan so ay voi mau so cua no ta duoc mot phan so moi lon gap 3 lan phan so ban dau.
GIUP MINH GAP NHOA!!!!!!!!!!!!!!!
Tim x
a.142.4^2-(7.5^2+4.x)=(4^3.157):4^2
b.[(7x+23):6^2-5^2]:29=18^2
Cac ban giup minh nha minh can ngay hom nay
Bai 1: Mot be nuoc lam bang ton ( co nap) dang hinh hop chu nhat co the tich 1,296 met khoi ,chieu dai gap doi chieu rong ,chieu cao 0,8m.Tinh dien tich ton dung de lam be do (khong tinh mep han)
giup minh voi nhe!( toan lop 5 nhe cac ban )
tim phan so duong a/b nho nhat(a,b thuoc n *) sao cho khi nhan phan so do voi 24/5 va 16/3 deu duoc tich la so tu nhien
Cac ban giup minh nha, mai minh phai di hoc rui!!!