Question

b = 2/ 2x4 + 1/4x6 + 1/6x8 + 1/8x10 + 1/100x102

Answer 1

Sửa đề: 1/2*4

B=1/2(2/2*4+2/4*6+...+2/100*102)

=1/2(1/2-1/4+1/4-1/6+...+1/100-1/102)

=1/2*50/102

=25/102