Question

r=1/2+1/4+1/8+1/16+1/32+1/64= ?

Answer 1

r = 1/2 + 1/4 + 1/8 = 1/16 + 1/32 + 1/64

2 X R = 1 + 1/2 + 1/4 +............. + 1/64

2 x r - r = 1 - 1/64

r = 63/64

Answer 2

\(r=\frac{63}{64}\)


tick đúng nha

Answer 3

r= \(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}+\frac{1}{64}\)

=> 2r = \(1+\frac{1}{2}+\frac{1}{4}+...+\frac{1}{32}\)

=> 2r - r = \(1-\frac{1}{64}\)

Vậy r =\(\frac{63}{64}\)