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praca kontrolna LP sem. IV


glosny88
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a co to jest "LP"?? zaraz coś spróbuje zrobić

widze że nie sa takie trudne

 

1a)

4^(x+1)+4^x = 320

4^x*(4+1) = 4^3*5 / :5

4^x = 4^3

x = 3

 

2a)

(1/4)^4x < 1/64

1/4^4x < 1/64

4^4x < 64

4^4x < 4^3

4x < 3

x < 3/4

 

logarytmów nie lubie:)

 

5.

zwykłe tw. pitagorasa wystarczy

c^2 = a^2 + b^2

10^2 = 8^2 + a^2

a = 6

obwód i pole to już chyba policzysz sam:P

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