Tính:
a) ( 1- \(\frac{1}{2}\)) x (1- \(\frac{1}{3}\)) x (1- \(\frac{1}{4}\)) x (1- \(\frac{1}{5}\)) x..........x ( 1- \(\frac{1}{99}\))x ( 1- \(\frac{1}{100}\))
b) ( ( 1+ \(\frac{1}{2}\)) x (1+ \(\frac{1}{3}\)) x (1+ \(\frac{1}{4}\)) x (1+ \(\frac{1}{5}\)) x..........x ( 1+ \(\frac{1}{99}\))x ( 1+ \(\frac{1}{100}\))
a)\(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{4}{5}......\frac{99}{100}\)
\(=\frac{1.2.3.4.....99}{2.3.4.5.6.....100}\)
\(=\frac{1}{100}\)
b) Tương tự như câu a
Ra kết quả phần b là \(\frac{101}{2}\) đúng hông?
a) 1/100
b) 101/2
Đs:
Hãy tk mình đi! Đúng 100%
a) 1/100
b) 101/2
Đs:
Hãy tk mình đi! Đúng 100%
b)(1+\(\frac{1}{2}\)).(1+\(\frac{1}{3}\))...(1+\(\frac{1}{100}\))
=\(\frac{3}{2}\).\(\frac{4}{3}\)...\(\frac{101}{100}\)
=\(\frac{3.4.5...101}{2.3....100}\)
=\(\frac{101}{2}\)
1/100 nhé bn
tích mk nha các bn
>_< học tốt
b) \(=\frac{3}{2}.\frac{4}{3}.\frac{5}{4}.......\frac{101}{100}\)
\(=\frac{101}{2}\)
\(=50,5\)
a, MK KO CHÉP ĐỀ NHA
= \(\frac{1}{2}\times\frac{2}{3}\times\frac{3}{4}\times\frac{4}{5}\times...\times\frac{98}{99}\times\frac{99}{100}\)
=\(\frac{1\times2\times3\times4\times...\times98\times99}{2\times3\times4\times5\times...\times99\times100}\)
=\(\frac{1}{100}\)
b,=\(\frac{3}{2}\times\frac{4}{3}\times\frac{5}{4}\times\frac{6}{5}\times...\times\frac{100}{99}\times\frac{101}{100}\)
=\(\frac{3\times4\times5\times6\times...\times100\times101}{2\times3\times4\times5\times...\times99\times100}\)
=\(\frac{101}{2}\)
a, = \(\frac{1}{2}\) x \(\frac{2}{3}\) x \(\frac{3}{4}\) x \(\frac{4}{5}\) x ..... x \(\frac{98}{99}\) x \(\frac{99}{100}\)
=\(\frac{1}{100}\)
b, = \(\frac{3}{2}x\frac{4}{3}x\frac{5}{4}x\frac{6}{5}x.....x\frac{100}{99}x\frac{101}{100}\)
= \(\frac{101}{2}\)
Tính :
a) ( 1 - 1/2 ) × ( 1 - 1/3 ) × ( 1 - 1/4 ) × ( 1 - 1/5 ) × .... × ( 1 - 1/99 ) × ( 1 - 1/100 )
= 1/2 × 2/3 × 3/4 × 4/5 × ... × 98/99 × 99/100
= 1 × 2 × 3 × 4 × ... × 98 / 2 × 3 × 4 × 5 × ... × 90 × 100
= 1/100
b) ( 1 + 1/2 ) × ( 1 + 1/3 ) × ( 1 + 1/4 ) × ( 1 + 1/5 ) × ... × ( 1 + 1/99 ) × ( 1 + 1/100 )
= 3/2 × 4/3 × 5/4 × 6/5 × .... × 100/99 × 101/100
= 3 × 4 × 5 × 6 × ... × 100 × 101 / 2 × 3 × 4 × 5 × ... × 99 × 100
= 101/2
trả lời
a)\(\frac{1}{100}\)
b)\(\frac{101}{2}\)
đáp số ...
hok tốt
a) =1/2.2/3.3/4.....99/100
=1.2.3.....99/2.3.4.5.....100
=1/100
b) 3/2.4/3.5/4.6/5.....100/99.101/100
=3.4.5.6.....100.101/2.3.4....99.100
=3.101/2=303/2
a)1/101
b)101/2
pls hay neu ban la nguoi tot , khong nghia la ban la nguoi xau
a, 1/100
b101/2
mk cho rằng đúng 100%
a.1/100
b.101/2
làm theo cách của bn Nguyễn Tiến Dũng là đùng r đó
