\(\frac{24.47-23}{24+47-23}\)
giải hộ với
Tính A= 24.47-23/24+47-23
Tính nhanh A bằng 24.47 trừ 23/24 cộng 47 trừ 23
24.47 - \(\frac{23}{24}\)+ 47 - 23
= 24.47 - 0.9583333333 + 47 - 23
= 23.51166667 + 47 - 23
= 70.51166667 - 23
= 47.51166667
A=\(\frac{24.47-23}{24+47-23}.\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
Hỏi A=?
Tính nhanh :
\(A=\frac{24.47-23}{24+47-23}.\frac{3+\frac{3}{7}+\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}+9}\)
P/s: Giúp đê
\(A=\frac{24.47-23}{24+47-23}.\frac{3+\frac{3}{7}+\frac{3}{11}-\frac{3}{1001}+\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}+9}\)
\(A=\frac{1105}{48}.\frac{3.\left(1+\frac{1}{7}+\frac{1}{11}-\frac{1}{1001}+\frac{1}{13}\right)}{9.\left(\frac{1}{1001}-\frac{1}{11}+\frac{1}{7}+1\right)}\)
\(A=\frac{1105}{48}.\frac{3.\frac{1311}{1001}}{9.\frac{1054}{1001}}\)
\(A=\frac{1105}{48}.\frac{3933}{1001}:\frac{9468}{1001}\)
\(A=\frac{1105}{48}.\frac{437}{1052}\)
\(A\approx9,56\)
Chú ý : Dấu xấp xỉ \(\approx\)
Câu 1: Thực hiện phép tính
a) A = \(\frac{24.47-23}{24+47-23}\). \(\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
b) M = \(\frac{1+2+2^2+2^3+...+2^{2012}}{2^{2014}-2}\)
HUHU ! CÓ AI BIẾT LÀM KO LÀM HỘ MÌNH VỚI CHIỀU NAY PHẢI NỘP RỒI !
\(A=\frac{24.47-23}{24+47-23}.\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
\(A=\frac{1105}{28}.\)\(\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{9+\frac{9}{7}-\frac{9}{11}+\frac{9}{1001}-\frac{9}{13}}\)
\(A=\frac{1105}{28}.\frac{3.\left(1+\frac{1}{7}-\frac{1}{11}+\frac{1}{1001}-\frac{1}{13}\right)}{9.\left(1+\frac{1}{7}-\frac{1}{11}+\frac{1}{1001}-\frac{1}{13}\right)}\)
\(A=\frac{1105}{28}.\frac{3}{9}\)
\(A=\frac{1105}{84}\)
b)\(M=\frac{1+2+2^2+2^3+...+2^{2012}}{2^{2014}-2}\)
Đặt \(A=1+2+2^2+2^3+...+2^{2012}\)
Suy ra \(2.A=2+2^2+2^3+2^4+...+2^{2013}\)
Khi đó \(2.A-A=2^{2013}-1\)hay \(A=2^{2013}-1\)
Do đó : \(M=\frac{A}{2^{2014}-2}=\frac{2^{2013}-1}{2^{2014}-2}=\frac{1}{2}\)
Vậy \(M=\frac{1}{2}\)
Tính nhanh:
A=24.47-23/24+47-23 . (3+3/7-3/11+3/1001-3/13)/(9/1001-9/13+9/7-9/11+9)
\(\frac{24.47-23}{24+24.27}\)
Hình như đề hơi sai, t sửa lại đề nhé :)
\(\frac{24.47-23}{24+23.47}\)
\(=\frac{\left(23+1\right)47-23}{24+23.47}=\frac{47.23+47-23}{24+23.47}=\frac{47.23+24}{24+23.47}=1\)
P/s: Hoq chắc :<
Tính nhanh :
A= \(\frac{24\cdot43-23}{24+47-23}\cdot\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
Giải hộ đúng mk tick
\(\frac{11}{12}.\frac{3.\left(1+\frac{1}{7}-\frac{1}{11}+\frac{1}{1001}-\frac{1}{13}\right)}{9.\left(\frac{1}{1001}-\frac{1}{13}+\frac{1}{7}-\frac{1}{11}+1\right)}=\frac{11}{12}.\frac{1}{3}=\frac{11}{36}\)
Tính nhanh :
\(A=\dfrac{24.47-23}{24+47-23}.\dfrac{3+\dfrac{3}{7}-\dfrac{3}{11}+\dfrac{3}{1001}-\dfrac{3}{13}}{\dfrac{9}{1001}-\dfrac{9}{13}+\dfrac{9}{7}-\dfrac{9}{11}+9}\)
A=(24.47-23)/(24+47-23) . [3(1+1/7-1/11-1/13+1/1001)]/[9(1+1/7-1/11-1/13+1/1001)]
=1105/48 . 3/9 =1105/144