一溫度計放入冰中,為-3度F,放在沸騰的水中為97度F,放入甲液體為19度F,請問甲真正為多少度C?(A)22度C,(B)20度C,(C)19,(D)16?

2016-12-03 2:27 am

回答 (1)

2016-12-03 5:24 am
Sol
f(x)=ax+b
f(-3)=-3a+b=0
f(97)=97a+b=100
(97a+b)-(-3a+b)=100-0
100a=100
a=1
b=3
f(x)=x+3
f(22)=19+3=22
(A)


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