Tìm y biết:(2/11*13+2/13*15+2/15*17+2/17*19+2/19*21)*462-y=19
Tìm y biết: (2/11*13 + 2/13*15 + 2/15*17 + 2/17*19 + 2/19*21) * 462 - y = 19
Tìm y biết :
( 2/11 * 13 + 2/13* 15 + 2/15 * 17 + 2/17 * 19 + 2/19* 21 ) * 462 - y = 19
tìm y biết:
(2/11x13 + 2/13x5 + 2/15x17 + 2/15x17 + 2/17x19 + 2/19x21) x 462 - y=19
các bn giúp mình với nhé! thanks(^-^)
Tính:
a) 1/15+135+1/63+1/99+1/143+1/195+1/255+1/323
b) 1/2 x 6+1/4 x 9+ 1/ 6 x12 +.............. + 1/36 x 37+1/ 38 x 60
Tìm y biết \(\left(\frac{2}{11x13}+\frac{2}{13x15}+\frac{2}{15x17}+\frac{2}{17x19}\right)+462-y=19\)
Tìm y:
(2/11x13 + 2/13x15 + 2/15x17 + 2/17x19 +2/19x21) x 462 - y = 19
tim y biet [2/11*13+2/13*15+2/15*17+2/17*19+2/19*21]*462-y=19
(2/11*13+2/13*15+2/15*17+2/17*19+2/19*21)*462-y=19
