1) P = 2a +2b
2b = P - 2a
b = P-2a /2
2) S =ab/2
ab = 2S
a= 2S/b
3) F =9/25C+32
F ( 25C+32 ) = 9
9 = 25FC + 32F
25FC = 32F - 9
C = 32F -9/ 25F
4) I = E/R+r
E = l ( R +r )
Пошаговое объяснение:
1) P = 2a +2b
2b = P - 2a
b = P-2a /2
2) S =ab/2
ab = 2S
a= 2S/b
3) F =9/25C+32
F ( 25C+32 ) = 9
9 = 25FC + 32F
25FC = 32F - 9
C = 32F -9/ 25F
4) I = E/R+r
E = l ( R +r )
Пошаговое объяснение: