Các câu hỏi tương tự
Tính nhanh
a,8/9.15/16.24/25.....2499/2500
b,(1-1/3)(1-1/6)(1-1/10)(1-1/15).....(1-1/780)
a/ A=8/9.15/16.24/25. .... .2499/2500
b/ B=(1-1/3)(1-1/6)(1-1/10)(1-1/15)...(1-1/780)
giup minh voi nhe mai phai nop rui
Tính
a)\(A=\frac{8}{9}.\frac{15}{16}.\frac{24}{25}....\frac{2499}{2500}\)
b)\(B=\left(1-\frac{1}{3}\right)\left(1-\frac{1}{6}\right)\left(1-\frac{1}{10}\right)\left(1-\frac{1}{15}\right)...\left(1-\frac{1}{780}\right)\)
GIÚP mk vs ạ , ai nhanh đúng mk sẽ tick ạ
A = 8/9.15/16.24/25....2499/2500
8/9.15/16.24/25................2499/2500
Bài 1:Tính nhanh.
a) A=3/4. 8/9. 15/17 *...*2499/2500.
b) B=(1- 1/7)*(1-2/7)* (1-3/7) ...(1-10/7)
Tính tích:
A= (1- 1/2).(1- 1/3). (1-1/4). ... .(1- 1/999). (1- 1/1000)
B= (1- 1/7). (1-2/7). (1- 3/7). ... .(1-10/7)
C=3/4.8/9.15/16. ... .2499/2500
D=(22/1.3). (32/2.4). (42/3.5). ... .(502/49.50)
A = 3/4.8/9.15/16....2499/2500
B = 3/3.5 + 3/5.7 + 3/7.9 + .....3/47.49
giúp em với câu này khó quá
Tính nhanh
a)21/4 . 3/8 + 43/4 . 3/8 - 4/1/2
b) 125% .(-1/2)² : (1/5/6 - 1,5) +2016º
c) 8/9 . 15/16 . 24/25 .... 2499/2500
Lm hộ mk nha. Ths