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< i m g s r c = " h t t p : / / w w w . f o r k o s h . d r e a m h o s t . c o m / m a t h t e x . c g i ? f = b o + a 1 b 1 + a 2 b 2 + a 3 b 3 + a 4 " >

\sum i = 1 n a i

\sum_{i=1}^n a_i

f (x) = x x x

\Large f(x)=x^{x^x}

f (x) = x x x

f(x)=x^{x^x}

f (x) = x x x

\Large f(x)=x^{x^x}

对 任 意 的 x > 0 ， 有 f (x) > 0.

\mbox{对任意的

x>0} \mbox{，有 }f(x)>0.

\int a 0 f (x) d x

\int a 0

d u d x ∣ ∣ ∣ x = 0 = 6.

cos 2 θ = = cos 2 θ - sin 2 θ 2 cos 2 θ - 1.

The characteristic polynomial χ (λ) of the 3 \times 3 m a t r i x ⎛ ⎝ ⎜ a d g b e h c f i ⎞ ⎠ ⎟ is given by the formula χ (λ) = ∣ ∣ ∣ ∣ λ - a - d - g - b λ - e - h - c - f λ - i ∣ ∣ ∣ ∣ .

x 2 + - b \pm b 2 - 4 a c - - - - - - - \sqrt 2 a - - - - - - - - - - - - - - - - - \sqrt

L O V E - - - - - - \sqrt

lim x \to 0

M N ¯ ¯ ¯ ¯ ¯ ¯

\overarrowlineMN

a + b \cdot c + z

a+b\cdot c+z

a + b \dots + z

a+b\cdots+z

u n d e r b r a c e a + b \dots + z 26

a^对应的是\hat{a}

aˇ对应的是\check{a}

a~对应的是\tilde{a}

a˙对应的是\dot{a}

a¨对应的是\ddot{a}

a...对应的是\dddot{a}

f (x)''

f (x)''

f'' (x)

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