Given the function f (x) = ln (1 + x) - x + K / 2 * x * x (k is not less than 0) (1) when k = 2, find the tangent equation of curve y = f (x) at point (1, f (1)) Which year's college entrance examination question is this? The second question is to find the monotone interval of F (x)

Given the function f (x) = ln (1 + x) - x + K / 2 * x * x (k is not less than 0) (1) when k = 2, find the tangent equation of curve y = f (x) at point (1, f (1)) Which year's college entrance examination question is this? The second question is to find the monotone interval of F (x)

Find the slope at 1, that is, the derivative at 1, and then do it quickly. I wanted to do it for you. I'm worried that if I read the original formula wrong, I'll do it myself, and I won't be contacted again