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我必须用以下来限制它:P(-1) = f(-1), P(0)=f(0), P(1)=f(1), P'(1)=f'( 1)
让多项式为
ax³ + bx² + cx + d
根据给定的方程,
- a + b - c + d = f(-1) d = f(0) a + b + c + d = f(1) 3a +2b + c = f'(1)
你应该可以解决。
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