\(\frac{4^7.8^3}{2^{20}}\)
giúp mk vs nhe
Những câu hỏi liên quan
\(\frac{4^7.8^3}{2^{20}}\)
Tính
\(2:\left(\frac{1}{2}-\frac{2}{3}\right)^3\)
\(\frac{5^4}{25^5}.\frac{20^4}{4^5}\)
\(\left(\frac{-10}{3}\right)^5.\left(\frac{-6}{5}\right)^4\)
\(\frac{7^5.5^7}{35^7}\)
Giúp mk vs huhuhu ToT
\(2:\left(\frac{1}{2}-\frac{2}{3}\right)^3=2:\left(-\frac{1}{6}\right)^3=2:\left(-\frac{1}{216}\right)=-432\)
\(\frac{5^4}{25^5}\cdot\frac{20^4}{4^5}=\frac{5^4\cdot20^4}{25^5\cdot4^5}=\frac{5^4\cdot4^4\cdot5^4}{5^5\cdot5^5\cdot4^5}=\frac{1}{100}\)
~CÁC BẠN GIÚP MK LÊN 200 ĐIỂM NHA. BẠN NÀO GIÚP THÌ MK K LẠI NHÉ.~
~THANKS~
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1,Thực hiện phép tính(tính nhanh nếu có thể):a
a, 49 8/23− (5 7/32+14 8/23)
b,(4− 5/12): 2+/24
c,− 3/7.8/9.− 3/7.1/9+17/7
Các bạn giúp mk vs nha mai mk phải có rồi.Cảm ơn trước
Giúp mk vs ạ!
1)Cho M(x)=\(1-\frac{1}{2^2}+\frac{2}{3^2}-\frac{3}{4^2}+......+\left(-1\right)^{x+1}\frac{x-1}{x^2}\)
Tính M(3) M(6) M(20) M(25) M(30)
2)Tính:
A=\(\left(1-\frac{2}{1.2.3}\right)^4+\left(3-\frac{5}{2.3.4}\right)^4+\left(5-\frac{10}{3.4.5}\right)^4+......+\left(59-\frac{901}{30.31.32}\right)^4\)
\(\frac{x}{2}+\frac{3}{2}\sqrt{x^2-4x+4}-2\)
giúp mk vs nhanh lên hộ vs hôm nay mk nộp bài cho rùi
\(\frac{x}{2}+\frac{3}{2}\sqrt{x^2-4x+4}-2=\frac{x}{2}+\frac{3}{2}\left|x-2\right|-2\)
Với x >= 2 thì \(\frac{x}{2}+\frac{3\left(x-2\right)}{2}=\frac{3x+x-6}{2}=\frac{4x-6}{2}=2x-3\)
Với x < 2 thì \(\frac{x}{2}+\frac{3\left(2-x\right)}{2}=\frac{x+6-3x}{2}=\frac{6-2x}{2}=3-x\)
1 + (-2) + 3 + (-4) + . . . + 19 + (-20)
mn ơi giúp mk vs !
= [ 1 + ( -2 ) ] + [ 3 + ( -4 ) ] + .... + [ 19 + ( -20 ) ] ( 10 cặp )
= ( -1 ) + ( -1 ) + ... + ( -1 )
= ( -1 ) x 10
= -10
=[1+(-2)] +[3+(-4)]+....+[19+(-20)]
=-1+(-1)+...+(-1)[10 số hạng (-1)]
=-1.10=-10
Tính B= 1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+...+1/20(1+2+3+...+20)
giúp mk vs!!!
Viết lại đề bài
\(B=1+\frac{1}{2\left(1+2\right)}+\frac{1}{3\left(1+2+3\right)}+\frac{1}{4\left(1+2+3+4\right)}+...+\frac{1}{20\left(1+2+3+4...+20\right)}\)
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22+32+...+212" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-block; float:none; font-size:15.82px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-break:break-word; word-spacing:normal" class="MathJax_CHTML mjx-chtml">
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2302" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-block; float:none; font-size:15.82px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-break:break-word; word-spacing:normal" class="MathJax_CHTML mjx-chtml">
\(2\times\left(\frac{1}{2}\right)^a< \left(\frac{1}{4}\right)^{20}\)
Với a là số nguyên nhỏ nhất
Giúp mk vs ><
Kết quả của phép tính -1-1/2-1/4-1/8-...-1/1024
Giúp mk vs nhanh nhanh nhe đg thi violympic !!!!!!!!!
Đặt A = -1-1/2-1/4-.....-1/1024
= -(1+1/2+1/4+.....+1/1024)
= -(1+1/2+1/2^2+.....+1/2^10)
2A = -(2+1+1/2+....+1/2^9)
A=2A-A= -(2+1+1/2+....+1/2^9-1-1/2-.....-1/2^10) = -(2-1/2^10) = -2047/1024
Tk mk nha
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