展开 sqrt((x+h)^2+1)-sqrt(x^2+1)

解答

展开

(x + h)^{2} + 1 - x^{2} + 1

x^{2} + 2 x h + h^{2} + 1 - x^{2} + 1

求解步骤

(x + h)^{2} + 1 - x^{2} + 1

乘开

(x + h)^{2} + 1 : x^{2} + 2 x h + h^{2} + 1

= x^{2} + 2 x h + h^{2} + 1 - x^{2} + 1

e x p an d \frac{x ( x ^{2} + 8 x + 2 )}{9}

e x p an d \frac{2000}{( s ^{2} + 10 s ) ( s + 10 )}

e x p an d P (2, 8) y C (0, - 2)

e x p an d 2 (\frac{11}{5} e^{- 2 t} + \frac{4}{5} e^{3 t})

e x p an d (e^{4 x} + 5)^{2}