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(0,25х-0,2) / (0,25х²+0,5х+0,3) = 0,05(5х-4) / 0,05(5х²+10х+6) = (5х-4) / (5х²+10х+6)
9) log(5) 24=log(5) (8*3)=log(5) (2^3) +log(5) 3=3 log(5) 2 +log(5) 3=3a+b
10) lg2 *(log(2) 75 -log(2) 15 +log(2) 20)=lg2 *(log(2) (5^2 *3)-log(2) (3*5)+
+log(2) (2^2 *5))=lg2 *(2log(2) 5+log(2) 3 -log(2)3 -log(2)5+2log(2) 2+log(2)5)=
=lg2 *(2log(2) 5+2)=(log(2) 2 /log(2) 10) *(2log(2) 5 +2)=1/(log(2) 5+log(2)2)*
*(2log(2)5+2)=1/(log(2)5+1)/(2(log(2)5+1)=1/2
=
Ответ:
Объяснение:
1) f(-2)=1/(2*(-2) ²)=1/(2*4)=1/8
2) g(-15)=1/(3*15²)=1/(3*225)=1/675
3) 1/8:1/675=675/8=84,375
Ab⁻² + a⁻¹b³ = a/b² + b³/a = (a²+b⁵)/(ab²)