Oblicz:
1.) 2 ⅓- 4⅔*,√2 23/49, + 3⁰*3³+ ( √7-3)(√7+3)
wynik: 20
2.) oblicz x na podstawie definicji logarytmu
a.) log₂x=6
b.) log₅x=4
c.) log √₂ x=2
d.) log ⅕ x =-2
e.) log √³x=4
f.) log x=0
g.) logπ x = 2
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2 ⅓- 4⅔*√(2 23/49)+3⁰*3³+(√7-3)(√7+3)=
7/3-14/3*√(121/49)+3³+7-9=
7/3-14/3*11/7+27-2=
7/3-2/3*11+25=
7/3-22/3+75/3=
60/3=20
a)
2⁶=x
x=64
b)
5⁴=x
x=625
c)
√2²=x
x=2
d)
⅕⁻²=x
x=5²
x=25
e)
√3⁴=x
x=9
f)
10⁰=x
x=1
g)
π²=x
x≈9,9
zad1.) 2 ⅓- 4⅔*,√2 23/49, + 3⁰*3³+ ( √7-3)(√7+3) =
⁷/₃ -¹⁴/₃ ·(√¹²¹/₄₉)+1·27+(7-9)= ⁷/₃-¹⁴/₃·¹¹/₇+27-2 = ⁷/₃ - ²²/₃+25 = -¹⁵/₃ +25=-5+25= 20 zad2
a)log₂x=6 ⇒ x=2⁶=64
b)log₅x=4 ⇒ x=5⁴=625
c)log√2x=2 ⇒ x=(√2)²=2
d)log⅕x=-2 ⇒ x=(⅕)-²=5²=25
e)log(√³)x=4 ⇒ x= (√3)⁴=3²=9
f)logx=0 ⇒ x=10°=1
g)logπx=2 ⇒ x=(π)²=(3,14)²=9,859 ≈9,9