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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: a, 0,75^7.2^15 giúp mik ik lm ơn hứa vote 5* và cảm ơn

Toán Lớp 7: a, 0,75^7.2^15 giúp mik ik lm ơn hứa vote 5* và cảm ơn

Comments ( 2 )

  1. Xin hay nhất nhé tus ^_^
    $0,75^{7}$ . $2^{15}$
    $\text{=}$ $0,75^{7}$ . $2^{14}$ . $\text{2}$
    $\text{=}$ $0,75^{7}$ . $(2^2)^{7}$ . $\text{2}$
    $\text{=}$ $0,75^{7}$ . $4^{7}$ . $\text{2}$
    $\text{= }$$(0,75 . 4)^{7}$ . $\text{2}$
    $\text{= }$$3^{7}$ . $\text{2}$
    $\text{= 2187 . 2 = 4374}$

  2. $0,75^{7}$ . $2^{15}$
    = $0,75^{7}$ . $2^{14}$ . 2
    = $0,75^{7}$ . ($2^{2}$)$^{7}$ . 2
    = $0,75^{7}$ . $4^{7}$ . 2
    = ( 0,75 . 4 )$^{7}$ . 2
    = $3^{7}$ . 2
    = 2187 . 2
    = 4374
    #Huy

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222-9+11+12:2*14+14 = ? ( )