Tính nhanh E=\(\frac{6}{8+1}.\frac{6}{18+1}.\frac{6}{30+1}...\frac{6}{10700+1}\)
Tính nhanh:
F=\(\left(\frac{6}{8}+1\right)\left(\frac{6}{18}+1\right)\left(\frac{6}{30}+1\right).....\left(\frac{6}{10700}+1\right)\)
F=(6/8+1)(6/18+1)(6/30+1)...(6/10700+1)
14.24.36...10706
F= ---------------------------
8.18.30....10700
7.2.8.3.9.4...106.101
F= -----------------------------------
8.1.9.2.10.3...107.100
(7.8.9....106)(2.3.4...101)
F= ----------------------------------------
(8.9.10...107)(2.3.4...100)
7.101
F= ----------
107
F=1
Mình nhầm nhé! Bạn để nguyên:
F =707/101 là được rồi
K mình nhé!
Tính nhanh:
A=(\(\frac{6}{8}\)+1)(\(\frac{6}{18}\)+1)(\(\frac{6}{30}\)+1)....(\(\frac{6}{10700}\)+1)
Giải nhanh giúp mình bài này nhé!!
\(\text{ta có:}\frac{6}{a\left(a+7\right)}+1=\frac{\left(a+1\right)\left(a+6\right)}{a\left(a+7\right)}\text{ do đó:}A=\frac{2.7}{1.8}.\frac{3.8}{2.9}.....\frac{101.106}{100.107}\)
\(=\frac{2.3...101.\left(7.8....106\right)}{1....101.\left(8.9.....107\right)}=\frac{7}{107}\)
Tính :
\(A=\left(\frac{6}{8}+1\right)\left(\frac{6}{18}+1\right)\left(\frac{6}{30}+1\right)...\left(\frac{6}{10700}+1\right)\)
Giúp cái !!!
Tính: A=\(\left(\frac{6}{8}+1\right)\cdot\left(\frac{6}{18}+1\right)\cdot\left(\frac{6}{30}+1\right)\cdot...\cdot\left(\frac{6}{10700}+1\right)\)
Tính giá trị biểu thức sau :
\(B=\left(\frac{6}{8}+1\right)\left(\frac{6}{18}+1\right)\left(\frac{6}{30}+1\right)...\left(\frac{6}{10700}+1\right)\)
Tính :
\(C=\left(\frac{6}{8}+1\right).\left(\frac{6}{18}+1\right).\left(\frac{6}{30}+1\right).....\left(\frac{6}{10700}+1\right)\)
Giúp mình với mình cần gấp
\(\left(\frac{6}{8}+1\right)\)\(+\left(\frac{6}{18}+1\right)+\left(\frac{6}{30}+1\right)+...+\left(\frac{6}{10700}+1\right)\)
Tính B = \(\left(\frac{6}{8}+1\right)\)x \(\left(\frac{6}{18}+1\right)\)x \(\left(\frac{6}{30}+1\right)\)x ... x \(\left(\frac{6}{10700}+1\right)\)
Bài 2 : Tính
\(D=\left(\frac{6}{8}+1\right).\left(\frac{6}{30}+1\right)....\left(\frac{6}{10700}+1\right)\)
HÃY CỐ GẮNG GIÚP MÌNH NHA CÁC P