a) $2^{x}$
Ta thấy $2^{3}$ = 8
⇒$2^{x}$ =$2^{3}$
⇒x=3
b) $2^{x}$ =16
Ta thấy $2^{4}$ =16
⇒$2^{x}$ =$2^{4}$
⇒x=4
Đáp án:
Giải thích các bước giải:
a) `2^x = 8`
`=> 2^x = 2^3`
`=> x = 3`
Vậy `x = 3`
b) `2^x = 16`
`=> 2^x = 2^4`
`=> x = 4`
Vậy `x = 4`
c) `2^x = 64`
`=> 2^x = 2^6`
`=> x = 6`
Vậy `x = 6`
d) `2^x = 128`
`=> 2^x = 2^7`
`=> x = 7`
Vậy `x = 7`
e) `3^x = 27`
`=> 3^x = 3^3`
d) `3^x = 81`
`=> 3^x = 3^4`
e) `4^x = 64`
`=> 4^x = 4^3`
f) `4^x = 16`
`=> 4^x = 4^2`
`=> x = 2`
Vậy `x = 2`
g) `5^x = 125`
`=> 5^x = 5^3`
h) `5^x = 25`
`=> 5^x = 5^2`
Học tốt. Nocopy.
Ve anime loli di Co mau ko digi Ko spam cop mang
Cho mk xin những câu văn những câu thơ câu châm ngôn hoặc những câu hay để mở bài hoặc viết các bài văn cho HSG vs ạ
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