MATEMATYKA Z PLUSEM , PODRĘCZNIK , 1 GIMNAZJUM , STR 197 ZAD 2
Z każdego z podanych niżej wzorów wyznacz x
/ (kreska ułamkowa )
"2" (do potęgi )
a) P = abx
b) R =ax/b
c) S = a/bx
d) T = 1/abx
e) y - 2t - 3x
f) y = 2(x - 1)
g) y = x - 1 / 2
h) y = 2/ x - 1
i) P = 1/3(a"2" + 2ax)
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a) P= abx |:ab
x= P/ab
b) R =ax/b / *b
R*b=ax /:a
x= R*b/a
c) S = a/bx |*x
S*x= a/b |:S
x= a/ b*S
d) T= 1/abx |*abx
Tabx = 1 |:Tab
x= 1/Tab
e)y= 2t-3x | + 3x
y +3x = 2t| - y
3x = 2t-y |:3
x= (2t-y)/3
f)y = 2(x - 1)
y= 2x-2/ +2
y+2= 2x /:2
x= y+2 / 2
g)y = x - 1 / 2 | *2
2y= x-1 | +1
x= 2y+1
h) ) y = 2/ x - 1 ) |*x-1
y*(x-1)= 2 |:y
x-1= 2/y | +1
x= 2/y+1
i)P=1:3(a²+2ax)
3P(a²+2ax) = 1 |: 3P
a² +2ax = 1/3P
2ax = 1/3P -a² |:2a
x = (1/3P-a²)/2a
a) P=abx |:ab
b) R =ax/b |x b
Rb = ax |:a
Rb/a = x
c) S = a/bx |x bx
bxS = a |:S
bx = a/S |:b
x= a/Sb
d) T= a/abx |x x
Tx = 1/ab
x= a/abT
e) y=2t-3x |-2t
y-2t = 3x |3
y-2t/3= x