Ciągi arytmetyczne

[matmabee]

Oblicz \(x\)
a) \(10,\ x,\ 20\)
b) \( -6,\ x,\ 14\)
c) \(-\frac{1}{3},\ x,\ -6\frac{1}{6}\)
d) \(8,\ 2x,\ 36\)
e) \(7,\ \frac{x}{2},\ 30\)
f) \(3,\ x^2,\ 29\)

[eresh]

Oblicz x
a)10,x,20

\(x=\frac{10+20}{2}\\
x=\frac{30}{2}\\
x=15\)

[eresh]

Oblicz x

b) -6,x,14

\(x=\frac{-6+14}{2}\\
x=\frac{8}{2}\\
x=4\)

[eresh]

Oblicz x

c)-1/3,x,-6 1/6

\(x=\frac{-\frac{1}{3}-6\frac{1}{6}}{2}\\
x=\frac{-\frac{2}{6}-\frac{37}{6}}{2}\\
x=-\frac{39}{12}\\
x=-\frac{13}{4}\)

[eresh]

Oblicz x

d) 8,2x,36

\(2x=\frac{8+36}{2}\\
2x=22\\
x=11\)

[eresh]

Oblicz x

e)7,x/2,30

\(\frac{x}{2}=\frac{7+30}{2}\\
x=37\)

[eresh]

Oblicz x

f)3,x^2,29

\(x^2=\frac{3+29}{2}\\
x^2=16\\
x=4\;\;\; \vee \;\;\;x=-4\)