MAY1
testin vastaukset
[[$ Testi MAY1
1.
^{2\text{)}}\frac{x}{3}+^{6\text{)}}\frac{x}{1}=^{\text{3)}}\frac{x-10}{2}\ \
\frac{2x}{6}+\frac{6x}{6}=\frac{3x-30}{6}\ \parallel\cdot6
2x+6x=3x-30
8x=3x-30
5x=-30\ \ \ \parallel:5
x=-6
2.
4-x>12\ \ \
-x>8\ \ \ \parallel:\left(-1\right)\
x<-8\ \ \ \ Huom! merkin suunta
3.
\frac{a^3\cdot a^2}{a}=\frac{a^5}{a^1}=a^4
4.
\left(-2b\right)^{-3}=\left(-\frac{1}{2b}\right)^3=-\ \frac{1}{8b^3}
5.
6^x=36
6^x=6^2
x=2
6.
4^{x-3}=16
4^{x-3}=4^2
x-3=2
x=5
<br /><br /><br />7.
3\cdot2^x=24\ \parallel:3
2^x=8
2^x=2^3
x=3 $]]