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文 [1]第 4 6页总复习参考题第 7题和文 [2 ]第88页复习参考题七B组第 3题是 :把函数 y =f(x)在x =a及x =b之间的一段图象近似地看作直线 ,设a c b ,证明 f(c)的近似值是f(a) +c-ab -a[f(b) - f(a) ] .文 [3]第 14 8页和文 [4 ]第 55页给出的参考解答是 :证明 设函数 y =f(x
Text [1] page 4 of the total review reference question 7 and text [2] page 88 review reference question seven group B question 3 is: the function y = f (x) in x = a and x = b A section of the image is approximately regarded as a straight line. Let acb, and prove that the approximate value of f(c) is f(a) + c-ab -a[f(b) - f(a)] .. [14] The reference answer given on page 8 and text [4] page 55 is: Prove function y = f (x