Oblicz wartosc wyrażeń
a) -28+12*(-0,5) do potegi 2 -6 * (-1/2) do potegi 3
b) -(-1/2) do potegi 3 +(-0,4) do potęgi 3 : ( 1 1/5) do potegi 2 * 2 12/16
c) -[-(-0,75) do potegi 2 +(1 1/4) do potegi 2] - 4 * (-1/2) do potegi 4
d) 130-[(-6) do potegi 2 * 4/9-9/8-(-0,5) do potegi 3] : 4 2/7
legenda 1/2- ułamek
2 oblicz wartosc wyrażen
a) -(-3,2)+( -2) do potegi 5 * ( 1/2 - 5/8) -(-0,8)
b) [(-1/5) do potegi 3 : ( 0,032)-(-2 1/2) do potegi 2 ] - (-25+52,4)
c) -[-(-1/2) do potegi 2 ] + [-(-1 1/2) dp potegi 2 ] + ( 0,1) do potęgi 3
Legenda 1/2 - UŁAMEK
Barrdzo porosze o obliczenia z góry dziękuje :P
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1) a) -28 + 12·(-0,5)² -6·(-½)³ = -28 +12 ·0,25 -6 · (-⅛) = -28 + 3 + ¾ = -25 +¾ =- 24¼
b) -(-½)³ + (-0,4)³ : (1⅕)² ·2 i12/16 = -(-⅛) -0,064 : 36/25 ·11/4 = ⅛ - 64/1000·25/36·11/4 =
= ⅛ - 11/90 = 45/360 - 44/360 = 1/360
c) -[-(-0,75)² + (1¼)²] - 4·(-½)⁴ = -[-9/16 +25/16] -4· 1/16 = -1 - ¼ = -1¼
d) 130 - [(-6)² · 4/9 - 9/8 - (-0,5)³] : 4i2/7 = 130 - [36· 4/9 - 9/8 + 0,125] : 30/7 =
= 130 - ( 16 - 1⅛ +⅛) : 30/7 = 130 - 15 · 7/30 = 130 - 7/2 = 130 - 3½ = 126½
2) a) -(-3,2) + (-2)⁵ ·(½ - ⅝) -(-0,8) = 3,2 -32 · (-⅛) + 0,8 = 3,2 + 4 + 0,8 =8
b) [(-⅕)³ : (0,032) - (-2½)²] - (-25+52,4) = [ -1/125 : 4/125 - (5/2)²] - 27,4 = = [-1/125 ·125/4- 25/4] -27,4 = ( -¼ -6¼) -27,4 = -6,5 - 27,4 = - 33,9
c) -[-(-½)²] + [-(-1½)²] + (0,1)³ = -(-¼) + [- (-3/2)²] + 0,001 = ¼ - 2¼ + 0,001 = -2 + 0,001 =
= - 1,999