Let h(x)=|k x+5|,then domainof f(x) be [...

Let `h(x)=|k x+5|`,then domainof f(x) be [-5,7], the domain of f(h(x)) be` [-6,1]`,and the range of h(x) be the same as the domain of f(x). Then the value of `k` is. (a)1 (b) 2 (c) 3 (d) 4

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