( lim _ x rightarrow 1 frac 2 x^ 3 -(2 k+1) x^ 2 +2 x+k x-1 =-6 ) হলে , ( k ) - এর মান কত? (If ( lim _ x rightarrow 1 frac 2 x^ 3 -(2 k+1) x^ 2 +2 x+k x-1 =-6 ) , then what is the value of ( (?) )
1.limx→1x−12x3−(2k+1)x2+2x+k=−6 হলে , k- এর মান কত? (If limx→1x−12x3−(2k+1)x2+2x+k=−6, then what is the value of (?)