C=1/100 − 1/100.99 − 1/99.98 − 1/98.97 − . . . − 1/3.2 − 1/2.1
nhớ giải thích vì sao
C=1/100 − 1/100.99 − 1/99.98 − 1/98.97 − . . . − 1/3.2 − 1/2.1 nhớ giải thích vì sao
By Raelynn
By Raelynn
C=1/100 − 1/100.99 − 1/99.98 − 1/98.97 − . . . − 1/3.2 − 1/2.1
nhớ giải thích vì sao
C=1/100-1/100×99-1/99×98-1/98×97-…………-1/3×2-1/2×1
C=1/100-(1/000×99+1/99×98+1/98×98+………+1/3×2+1/2×1)
C=1/100-(1-1/2+1/2-1/3+……+1/97-1/98+1/98-1/99+1/99-1/100)
C=1/100-(1-1/100)
C=1/100-99/100
C= -98/100
C= -49/50
nhớ vote 5 sao+câu trả lời hay nhất+cảm ơn
Đáp án:
`C=-49/50`
Giải thích các bước giải:
`C=1/100 − 1/100.99 − 1/99.98 − 1/98.97 − . . . − 1/3.2 − 1/2.1 `
`=>C=1/100 − (1/100.99 + 1/99.98 + 1/98.97 + . . . + 1/3.2 + 1/2.1) `
`=>C=1/100 − (1/1.2 + 1/2.3 + 1/3.4 + . . . + 1/98.99 + 1/99.100) `
`=>C=1/100 − (1-1/2 + 1/2-1/3 + 1/3-1/4 + . . . + 1/98-1/99 + 1/99-1/100) `
`=>C=1/100 − (1-1/100) `
`=>C=1/100-99/100`
`=>C=-98/100`
`=>C=-49/50`