... dung co cong COM khong ? Co So luong cong COM la : Dia chi cac cong COM la : 3f8 2f8 INCLUDE lib1.asm MODEL small STACK 100h DATA M1 db ’May tinh dang dung co cong COM không ? $’ co db Co $’ ... Only+Hidden+System' Archive' Archive+Read Only' 10 Archive+Hidden' 11 Archive+Read Only+Hidden' 12 Archive+System' 13 Archive+Read Only+System' 14 Archive+Hidden+System' 15 Archive+Read Only+Hidden+System' ... dang dung co cong LPT khong ? Co So luong cong LPT la : Dia chi cac cong LPT la : 3BC 378 278 Chú ý : Giống INCLUDE lib1.asm MODEL small STACK 100h DATA M1 db ’May tinh dang dung co cong LPT không...
... cap so cong"); else printf ("\n\nDay so vua nhap ko la cap so cong"); /* thuc hien lai */ fflush (stdin); h = getch(); if (h == 13) goto hoi; hoi: printf ("\n\nBan co muon thuc hien lai bai toan ... tu)",sa,sd); /* Thuc hien lai bai toan */ hoi: printf ("\n\nBan co muon thuc hien lai bai toan lan nua khong? c k"); fflush (stdin); h = getch(); if (h == 99) goto lap; if (h == 107) goto end; ... if (h == 13) goto hoi; hoi: printf ("\n\nBan co muon thuc hien lai bai toan lan nua khong? c k"); fflush (stdin); h = getch(); if (h == 99) goto lap; if (h == 107) goto end; else goto hoi; getch();...
... x < 2 < x < Lời bình : Cũng , nguyên nhân sai lầm áp dụng log ( x − ) = log ( x − ) , co hẹp miền xác định phương trình làm nghiệm x = ! b) ( log ( 3x − ) log x = log x ) 2 + log (...
... inx.cos x − cos x.sin x) = cos x.cos3 x ⇔ s inx.sin( −2 x) = cos x.cos3x ⇔ −2sin x.cos x = cos x.cos3 x ⇔ − sin x = cos x.cos3 x (do cosx ≠ 0) − cos2 x π π ⇔− = (cos4 x + cos2 x ) ⇔ cos4 x = −1 ... (8.1) ⇔ (4 cos3 x − 3cos x)cos2 x − = ⇔ cos x − 3cos 2 x − = cos 2 x = ⇔ cos x = − (vơ nghiêm) ⇔ sin x = ⇔ x = kπ ⇔ x = k π (k ∈ ») ( cos8 x + cos4x ) − = ⇔ 2cos2 x + cos4 x − = cos4 x = ... = / cos x • Với t = ta có = ⇔ cos x = 2(1 − cos x) ⇔ 2cos x + cos x − = sin x cosx = − (loai) π ⇔ ⇔ x = ± + k 2π (k ∈ ») cos x = cos x ta có = ⇔ 3cos x = 2(1 − cos x) ⇔ 2cos x + 3cos x...