Question

1pe20plus2pe20plus3pe20plus...plus19pe20

Answer 1

1/20+2/20+3/20+4/20+5/20+6/20+7/20+8/20+9/20+10/20+11/20+12/20+13/20+14/20+15/20+16/20+17/20+18/20+19/20=190/20=9,5

Iuliana❤

Answer 2

$\frac{1}{20} + \frac{2}{20 } + ... + \frac{19}{20} = \\ aplicam \: suma \: lui \: gauss \: \\ \frac{1 + 2 + ... + 19}{20} = \frac{19(19 + 1) \div 2}{20} = \frac{19 \times 20 \div 2}{20} = \frac{380 \div 2}{20 } = \frac{190}{20} = { \frac{190}{20} }^{(10} = \frac{19}{2} = 9.5$