Violympic toán 7
Các câu hỏi tương tự
Tính :
1) C = \(\left(\dfrac{1}{200^2}-1\right)\left(\dfrac{1}{199^2}-1\right)...\left(\dfrac{1}{101^2}-1\right)\)
2) \(D=\dfrac{1}{1-\dfrac{1}{1-2^{-1}}}+\dfrac{1}{1+\dfrac{1}{1+2^{-1}}}\)
Tính
A = ( 1 - 1/1+2 ) ( 1 - 1/1+2+3 )( 1 - 1/1+2+3+4 ) ....... ( 1 - 1/1+2+3+....+99 )( 1 - 1/1+2+3+....+100 )
(1-1/1+2)(1-1/1+2+3)(1-1/1+2+3+4)+.......+(1-1/1+2+3+....+2012)
A = (1- 1/2)(1-1/3)(1-1/4)...(1-1/2016)(1-1/2017)
Tính A :
A= (1-1/1+2)*(1-1/1+2+3)*(1-1/1+2+3+4)+...+(1-1/1+2+3+4+...+2016)
Cho A=\(\left(\dfrac{1}{2}-1\right).\left(\dfrac{1}{3}-1\right).\left(\dfrac{1}{4}-1\right)...\left(\dfrac{1}{2015}-1\right).\left(\dfrac{1}{2016}-1\right).\left(\dfrac{1}{2017}-1\right)\)
B=\(\left(-1\dfrac{1}{2}\right).\left(-1\dfrac{1}{3}\right).\left(-1\dfrac{1}{4}\right)...\left(-1\dfrac{1}{2015}\right).\left(-1\dfrac{1}{2016}\right).\left(-1\dfrac{1}{2017}\right)\)
Tính M=A.B
Tính tổng
1,A=a1+a2+...+an với ai-ai-1=k
2,B=1/1*2*3+1/2*3*4+...+1/48*49*50
3,C=1+1/3+1/5+...+1/97+1/99
/
1/1*99+1/3*97+...+1/97*3+1/99*1
CHUYÊN MỤC HỎI NGU
y = 1 + 1 => 1 = y - 1 hay 1 cx = y - 1 hay 1 + 1 = y hay y = 1 + 1 zay hỏi 1 + 1 = ?
Cho A = 1 + 1/2 + 1/3 + 1/4 +...+ 1/4026, B = 1 + 1/3 + 1/5 + 1/7 +...+ 1/4025 So sánh A/B với 1 + 2013/2014
Chứng tỏ rằng :1-1/2+1/3+1/4+...+1/99-1/200=1/101+1/102+...+1/199+1/200 .