Question

Mọi người giúp mik câu h,i bài 2; bài 3 với

Answer 1

bài 2
h)
\(5^x+5^x.5^3=630\)
\(5^x\left(1+5^3\right)=630\)
\(5^x.126=630\)
\(5^x=5\)
x=1

 

Answer 2

bài 2 

b) \(2/3\)\(.(-5/3)+11/3.-5/3\)

\(=(2/3+11/3).(-5/3)\)

\(=-65/9\)

Answer 3

c) \((-2/5)^2+21/25.(-2021/2022)^0-(1/3-1/8):7/12\)

\(= 4/25+0-5/14\)

\(=-69/350\)

Answer 4

c

\(=(93/7+19/7):(-8/9)\)

\(=16:(-8/9)\)

\(=-18\)