(1-3/5)x=(1-40%)(100-x) 还有(1+4/7)x=(1-40%)(x+18)
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(1-3/5)x=(1-40%)(100-x) 还有(1+4/7)x=(1-40%)(x+18)
(1-3/5)x=(1-40%)(100-x) 还有(1+4/7)x=(1-40%)(x+18)
(1-3/5)x=(1-40%)(100-x) 还有(1+4/7)x=(1-40%)(x+18)
1
(1-3/5)x = (1-2/5)(100-x)
2/5x = 100-x-60+2/5x
x = 40
2
11/7x = 3/5x + 54/5
两边同乘35,得
55x = 21x + 378
x = 189/17
3/x-1=4/x 6/x+1=x+5/x(x+1)
已知:f(x)=x(x-1)(x-2)(x-3)……(x-100),求f'(5)
60%x+25=40 x+30%x=52 19-120%x=7 4分之3x-5%x=17.5 x-10%x=18 (1-25%)x=36 2x+30%x=9.2
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