" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x³ = ... lub x = ...
b) x³ = 125
x³ =5 lub x =-5
c) x³ = 512
x³ = 8 lub x =-8
d) x³ = 729
x³ = 9lub x = -9
e) x³ = 1 000
x³ =10lub x =-10
f) x³ = 8 000
x³ =20 lub x =-20
9, -27, 81, -243, 1 w postaci potęgi o podstawie -3.
9 =-(3)²
-27 =(-3)³
81 =(-3)⁴
-243 =(-3)⁵
1 =(-3)⁰
Zad. 3
A) 4 * ( -0,5)² + 6 * ( - ⅔ )² =4*0,25+6*⁴/₉=1+⁸/₃=1+2 ²/₃=3 ²/₃
B)( ½)² + (- 0,8 ) : (-⁴/₅ ) =¹/₄-⁸/₁₀ *(-⁵/₄)=¹/₄ +²/₂=¹/₄+1=1 ¹/₄
C) ( 4 * ³/₂² - ²/₅² ) : 2,2 =(4*⁶/₄-⁴/₂₅ ):²²/₁₀ =
=(6-⁴/₂₅)*¹⁰/₂₂=⁶⁰/₂₂-⁴⁰/₅₅₀ =²⁴⁰⁰/₅₅₀-⁴⁰/₅₅₀=²³⁶⁰/₅₅₀=2 ³⁶/₅₅
x³ = -5 lub x = 5
c) x³ = 512
x³ = -8 lub x = 8
d) x³ = 729
x³ = -9 lub x = 9
e) x³ = 1 000
x³ = -10 lub x = 10
f) x³ = 8 000
x³ = -20 lub x = 20
Zad. 2
9 = -3²
-27 = -3³
81 = -3 do potęgi 4
-243 = -3 do potęgi 5
1 = -3 do potęgi 0
Zad. 3
A) 4 * ( -0,5)² + 6 * ( - ⅔ )² = 1 cała i 24/25
B) ( ½)² + ( - 0,8 ) : ( -⁴/₅ ) = 1 cała i 1/4
C) ( 4 * ³/₂² - ²/₅² ) : 2,2 = 43