69. if s(x) 4?+ 2x+1 then its maximum value is a f(r) 4 +2x+1 (1) 4/3 (2) 2/3 (3) 1 4) 3/4 70. the function f{x) = 2x -15x*+36x+ 4 is maximum at x= te4 ti ra f(

69. If S(x) 4?+ 2x+1 then its maximum value is A f(r) 4 +2x+1 (1) 4/3 (2) 2/3 (3) 1 4) 3/4 70. The function f{x) = 2x -15x*+36x+ 4 is maximum at x= Te4 TI RA f(x)= 2x-15x 4+36x + 4 feeaH RIT Ta x= (1) 3 (2) 0 (3) 4 (4) 2 71. The sum of two non-zero numbers is 8. The minimum value of the sum of their reciprocals is (1) 1/4 (2) 1/2 (3) 1/8 (4) None of these (1) 14 (2) 1/2 (3) 1/8 72. For given function U =r+y-3x-27y+24, minimum value of U wil!! Qccur at point f T U=*+y -3x-27+24 g U HA 0H EITT (1) (-1,-3) (2) (-1, 3) 0) (1,-3) (4) (1,3)