2²º-1-2-2²-2³-···-2ˆ19
2²º-1-2-2²-2³-...-2ˆ19
1+2+2²+2³+·········+2的63次方 实数
计算1×2²+2×3²+3×4²+4×5²+······+18×19²
s=1+2+2²+2³+····+2的2008次方,求s的值.
1·计算1.5-⅓×(-7/6)º+8º·²5×4√2+(³√2×√
直接求和:-1²+2²-3²+4²-5²+6²-······
1-2²+3²-4²+5²-6²+······+99²-10
计算 (2x-1)²·(1-2x)³·(2x-1)
(3x³)²·(2x²)³计算
计算x·x²·x³+(2²)³+(-3x³)²
(-x)^6-3x³·3x³-(-2x²)·(-2x²)·(-2x²)
2012²-2011²+2010²-2009²8······+2²-1