ПомогитеS1=1/2•5•5=S2=1/2•3•7=S3=1/2•2•2=S4=5•7=S5=S4-S1-S2-S3=

Question

Помогите
S1=1/2•5•5=
S2=1/2•3•7=
S3=1/2•2•2=
S4=5•7=
S5=S4-S1-S2-S3=

Answer 1

S1=1/2*25=12,5
S2=1/2*21=10,5
S3=1/2*2*2=1*2=2
S4=35
S5=35-(12,5+10,5+2)=35-25=10.