If f(x) = {8x−4x−2x+1x2,x>0exsinx+πx+λ,x⩽0 is continuous at x = 0, then the value of λ is यदि f(x) = {8x−4x−2x+1x2,x>0exsinx+πx+λ,x⩽0, x = 0 पर सतत है, तब λ का मान है