Toán Lớp 7: Tính :
a) $3^{2010}$ -($3^{2009}$ + $3^{2008}$ + $3^{2007}$ +…+3+ $3^{0}$ )
b)$1^{2}$ -$2^{2}$+ $3^{2}$ – $4^{2}$ +$5^{2}$ -$6^{2}$ +…+$2009^{2}$- $2010^{2}$
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Toán Lớp 7: Tính :
a) $3^{2010}$ -($3^{2009}$ + $3^{2008}$ + $3^{2007}$ +…+3+ $3^{0}$ )
b)$1^{2}$ -$2^{2}$+ $3^{2}$ – $4^{2}$ +$5^{2}$ -$6^{2}$ +…+$2009^{2}$- $2010^{2}$
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