Question

(2 + 4 + 6 + ... + 98) x (\(\dfrac{3}{4}\) x 8 - 15 x 0,4) x (\(\dfrac{1}{2}\) + \(\dfrac{1}{4}\) + \(\dfrac{1}{8}\) + ... + \(\dfrac{1}{512}\) )
Giúp mình vớiii

Answer 1

\(=\left(2+4+6+...+98\right)\left(6-6\right)\left(\dfrac{1}{2}+\dfrac{1}{4}+...+\dfrac{1}{512}\right)\)

=0

Answer 2

 

= ( 2+4+6+...+98 ) ( 6- 6) ( 1/2+1/4 + .......+ 1/ 512 ) 

= 0

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Answer 3

= (2 + 4 + 6 + ... + 98) x ( 6 - 6 ) x ( \(\dfrac{1}{2}\) + \(\dfrac{1}{4}\) + \(\dfrac{1}{8}\) +...+ \(\dfrac{1}{512}\))

= (2 + 4 + 6 + ... + 98) x      0      x ( \(\dfrac{1}{2}\) + \(\dfrac{1}{4}\) + \(\dfrac{1}{8}\) +...+ \(\dfrac{1}{512}\))

=  0

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