Can you check if these answers is correct or not?

11) fex) = x 1/3 ( x + 3 ) 13 12 ) fex ) = X FIND ALL LOCAL * 2 - 1 FIND ALL VALUES OF X WHERE MIN AND MAX POINST OF $. for HAS AN I. P. IDENTIFY AS MIN OR MAX none X - 0 13 ) f (x ) = 2 SINx + Cost x , xe -, 25TT 25TT 12 14 ) f(x ) = 2 SINX + SIM'X , HE FIND AND IDENTIFY ALL VALUES OF XA FIND ALL VALUES OF X WHERE Y WHERE I HAS A LOCAL MIN OR MAX , HAS AN 1. P. max X = min : str 6 2 6 15 1 FIND Jum ( cosx ) *= 16) f(x ) = x- 3x13 FIND AND x - 0+ IDENTIFY THE INTERVALS WHERE + IS INCREASING, DECREASING. Increasing e ( - * , 1 ) " ( 1 , of ) decreasing ( - 1 , 6 ) v ( 0 2 1 )