Question

1.Tính a)-1-1\2(1+2)-1\3(1+2+3)-...-1\101(1+2+...+100)

b)(1+1\2)(1+1\3)(1+1\4)...(1+1\100)

các bạn giúp mik vs mik gấp lắm rùi

Answer 1

1b) Ta có: \(\left(1+\frac{1}{2}\right).\left(1+\frac{1}{3}\right)....\left(1+\frac{1}{100}\right)\)

\(=\frac{3}{2}.\frac{4}{3}.\frac{5}{4}......\frac{101}{100}=\frac{3.4.5....101}{2.3.4....100}=\frac{101}{2}\)

Answer 2

AI K CHO MU TA THẾ

Answer 3

MK NÈ, BẠN ẤY LÀM TỐT MÀ!