Các câu hỏi tương tự
tim hai so biet tong cua chung la 3.neu tang sp thu nhat gap 3 lan va giam so thu hai di hai lan thi tong cua so thu nhat va so thu hai la 39
Ba so ti le voi 5,6,7. Neu gap doi so thu nhat, gap 3 so thu 2 thi tonng 3 so luc bay gio la 70. Tim 3 so do?
tim 3 so tu nhien lien tiep,biet tich cua 2 so sau lon hon tich cua 2 so dau la 25
tim 3 so tu nhien chan lien tiep,bieu neu ta lay binh phuongcua so o giua tru di tichcua so lon nhat va so be nhat thi ket qua thu dc dung bang 1/3n cua so be nhat
tu cua mot phan so nho hon mau cua no la 50 don vi. neu them vao tu 17 don vi , vao mau 2 don vi thi duoc phan so moi bang nghich dao cua phan so ban dau. tim phan so ban dau
cho tam giac abc vuong tai a co so do do dai canh huyen bc la so huu ti .ve phia ngoai tam giac dung hinh chu nhat bcde sao cho cd = bc/\(\sqrt{2}\) . goi m va n theo thu tu la giao diem cua ad , ae voi bc . chung minh \(\sqrt{bm^2+cn^2}\) la so huu ti
hop chat A co cong thuc phan tu la \(M_2X\). Tong so hat mang dien nhieu hon so hat ko mang dien la 116 , trong do tong so hat mang dien nheu hon tong so hat ko mang dien la 36 . Nguyen tu khoi cua X lon hon nguyen tu khoi cua M la 9 . Tong so hat trong nhuyen tu X nhieu hon tong so hat trong nguyen tu M la 14 . Xac dinh cong thuc phan tu cua A
nho cho cach giai cu the nha
tìm ba so biet tong binh phuong cua chung la 481.biet so thu hai bang 2,7so thu nhat va bang 0,75 so thu ba
tim phan so co dong thoi cac tinh chat sau
a/Tu cua phan so la so tu nhien co mot chu so
b/Hieu giua tu so va mau so la 4
c/Neu giu nguyen tu so va viet them vao ben phai mau so mot chu so dung bang tu so,thi duoc phan so moi bang phan so 1/5
Mau so cua 1 phan so lon hon tu so cua no la 3 don vi . Neu tang ca tu va mau them 2 don vi thi duoc phan so moi bang 1 phan 2 . Tim phan so ban dau