x+y=2,x2+y2=4 ,x3+y3=?
x+y=2,x2+y2=4 ,x3+y3=? Correct Answer 8
দেয়া আছে, x + y = 2,x2 + y2 = 4x2 + y2 = (x + y)2 - 2xyবা, 4 = (2)2 - 2xyবা, 4 = 4 - 2xy.'. xy = 0 এখন x3 + y3 = (x + y)3 - 3xy(x + y) = (2)3 - 3×0×2 = 8x+y=2,x2+y2=4 ,x3+y3=? Correct Answer 8
দেয়া আছে, x + y = 2,x2 + y2 = 4x2 + y2 = (x + y)2 - 2xyবা, 4 = (2)2 - 2xyবা, 4 = 4 - 2xy.'. xy = 0 এখন x3 + y3 = (x + y)3 - 3xy(x + y) = (2)3 - 3×0×2 = 8