Question no. 7 & 9 pls with steps

Question no. 7 & 9 pls with steps Show Let f Ihat ( is continuous I — cos 4 x For what value a, is ' f' continuous ÉbrA1'hal value k . is the function sin SX continuous at X = 0 ? cosx — I cot x — I 4 at Find the Find th 7. 9. so that f becomes continuousat x = — Find the value of Examine for continuity , the function X — a 'Sin 0 Examine for continuity , the function 'f' defined by 0 log(l+ax)— is notdeJinedat x •O. The function f(.v) = Find the value f(0)so that f is continuousatx —0. Let x *O and f A. For "'hat value of A. if any. is f continuous at x = 00 Determine the values of a. b and c for which the junction sins may be continuous at x = O. q.V+b.r2—Cx . x 19. If the (iO Fil