Anh chị giúp em giải hết trắc nghiệm được không ạ ? 🥺
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Những câu hỏi liên quan
5 tháng 5 2021
const fi='kt.txt';
fo='kq.out';
var f1,f2:text;
s:string;
i,dem,d:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,s);
d:=length(s);
dem:=0;
for i:=1 to d do
if s[i]='e' then inc(dem);
writeln(f2,dem);
close(f1);
close(f2);
end.
NB
0
31 tháng 10 2021
Câu 3:
c: Xét ΔAHB vuông tại H có HE là đường cao
nên \(AE\cdot AB=AH^2\left(1\right)\)
Xét ΔAHC vuông tại H có HF là đường cao
nên \(AF\cdot AC=AH^2\left(2\right)\)
Từ (1) và (2) suy ra \(AE\cdot AB=AF\cdot AC\)
19 tháng 2 2023
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