Determine the value of kkk such that (f∘g)(2)=10(f \circ g)(2) = 10(f∘g)(2)=10, where f(x)=x2+kf(x) = x^2 + kf(x)=x2+k and g(x)=3x−1g(x) = 3x - 1g(x)=3x−1.
k=−15k = -15k=−15
k=1k = 1k=1
k=−1k = -1k=−1
k=5k = 5k=5