Please help me with these following problems: 1.)Indicate whether each of the following functions is invertible in the given interval. Explain a.) sech x on [0,infinity) b.) cos (ln x) on (O, e^pie] c.) e^(x^2) on (-1,2] My work process for a: let y= sech x how do i find x in terms of y for this eq. how do i isolate the x variable from sech x. once I find that i can see if the positive values of x for the inverse function exist from 0 to infinity. however, i need help finding the inverse function My work process for b.) let y= cos (ln x) I took the expotential of both sides to get e^y= e^(cos*(lnx)) how do i isoloate e*(lnx) to equal x , since the lnx is a part of the cosine angle expression.. i need help here... once i find the inverse equation, i can see if y values exists for the x values from 0 to e^pie... i need help finding the inverse equation first My work process for c.) let = y= e^(x^2) therefore taking the natural logarithm of both sides i get ln y= ln (e^(x^2) ln y= x^2 therefore x= sqrt (ln y) therefore f^-1 (x)---> inverse function is f(x)= sqrt (ln x) when subbing (-1,2] for x to determine if y values exist, i find the inverse function doesn't exist under those limits since ln 0 is undefined is this the correct approach to this problem. Please help me with these problems!