<span>matlab的求和运算</span>
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表达式f对自变量从a到b求和：其中inf表示正无穷大
F = symsum(f,k,a,b)
F = symsum(f,k)
syms k x S1 = symsum(k^2, k, 0, 10) S2 = symsum(1/k^2, k, 1, Inf) S3 = symsum(x^k/factorial(k), k, 0, Inf)
S1 = symsum(k^2, k, [0 10]) S2 = symsum(1/k^2, k, [1; Inf]) S3 = symsum(x^k/factorial(k), k, [0 Inf])
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