tính C C=4^2019 -4^2018 – 4^2017 – … – 4 -1 help me thanks. 31/10/2021 Bởi Abigail tính C C=4^2019 -4^2018 – 4^2017 – … – 4 -1 help me thanks.
$C=4^{2019}-4^{2018}-4^{2017}-…-4-1$ $⇒4C=4^{2020}-4^{2019}-4^{2018}-4^{2017}-…-4$ $⇒4C-C=4^{2020}-2.4^{2019}+1$ $⇔3C=1+2.4^{2019}$ $⇔C=\frac{1+2.4^{2019}}3$ Vậy ……………….. Bình luận
Đáp án: `C=(4^2020-2.4^2019+1)/3` Giải thích các bước giải: `C=4^2019-4^2018-4^2017-…..-4-1` `=>4C=4^2020-4^2019-4^2018-….-4^2-4` `=>4C-C=3C=4^2020-2.4^2019+1` `=>C=(4^2020-2.4^2019+1)/3` Bình luận
$C=4^{2019}-4^{2018}-4^{2017}-…-4-1$
$⇒4C=4^{2020}-4^{2019}-4^{2018}-4^{2017}-…-4$
$⇒4C-C=4^{2020}-2.4^{2019}+1$
$⇔3C=1+2.4^{2019}$
$⇔C=\frac{1+2.4^{2019}}3$
Vậy ………………..
Đáp án:
`C=(4^2020-2.4^2019+1)/3`
Giải thích các bước giải:
`C=4^2019-4^2018-4^2017-…..-4-1`
`=>4C=4^2020-4^2019-4^2018-….-4^2-4`
`=>4C-C=3C=4^2020-2.4^2019+1`
`=>C=(4^2020-2.4^2019+1)/3`