Tính
A=1+2+3+4+5+-.+99+100
B= \(\dfrac{1}{2}\)+ \(\dfrac{1}{6}\)+\(\dfrac{1}{12}\)+\(\dfrac{1}{20}\)+ \(\dfrac{1}{30}\)+-+\(\dfrac{1}{9900}\)
Loga
Toán lớp 6
Tính
A=1+2+3+4+5+-.+99+100
B= \(\dfrac{1}{2}\)+ \(\dfrac{1}{6}\)+\(\dfrac{1}{12}\)+\(\dfrac{1}{20}\)+ \(\dfrac{1}{30}\)+-+\(\dfrac{1}{9900}\)
