Question

(1-1/4)(1-1/9)(1-1/16)(1-1/25)(1-1/36)(1-1/49)(1-1/64)(1-1/8

Answer 1

(1-1/4)(1-1/9)(1-1/16)(1-1/25)(1-1/36)(1-1/49)(1-1/64)(1-1/81)(1-1/100)

=(1-1/2)(1+1/2)(1-1/3)(1+1/3)``````(1-1/10)(1+1/10)

=1/2*3/2*2/3*4/3``````*9/10*11/10

=11/20