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Людмила ФАТА [14]
(231/5-1493/50):86/10=(2310/50-1493/50):86/10=2310/50:86/10-1493/50:86/10=231/43-1493/430=2310/430-1493/430=817/430=1 i 387/430
A = 8, В = 6, F = 12, C = 16.
F = A + B + C / 0.5 E;
12 = 8 + 6 + 16 / 0.5 E;
12 = 30 / 0.5 E
30 / 0.5 E = 12
0.5 E = 30 / 12
0.5 E = 2.5
E = 5
F'(x)=10*(1/2)*x^(-1\2)-1=(5\корень(х))-1
<span>(5\корень(х))-1=0
</span><span>(5\корень(х))=1
</span>корень(х)=5
х=25
7х-21-10у=4у-35
6х=5у-40+56
7х=14у-14
6х=5у+16
х=2у-2
6(2у-2)=5у+16
х=2у-2
12у-12=5у+16
х=2у-2 х=2у-2 х=2*4-2 х=6.
7у=28 у=4 у=4 <span> у=4.</span>