2м40дм+3м5дм=95дм
2м40дм=60дм
3м5дм=35дм 35+60=95дм
<u>1; 1 1/2; 2; 2 1/2; 3; 3 1/2; 4; 4 1/2 ; 5; 5 1/2.</u>
1 + 1 1/2 + 2 + 2 1/2+ 3+ 3 1/2 + 4+ 4 1/2 + 5 + 5 1/2 =
1 + 1 + 2 +2 +3 +3 + 4 + 4 + 5 + 5 + (5 * 1/2) = 30 + 2 1/2 = <u>32 1/2</u>
y = ln5x
y' = (5x)'/5x = 5/5x = 1/x
y'(1) = 1/1 = 1
Ответ : 1
AB-13см,BC-12см,CA-14см.Периметр=13+12+14=39см