Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Alegeţi formula corectă pentru Sn suma primilor n termeni ai unei progresii geometrice [straight b subscript 1 comma space straight b subscript 2 comma space... space comma space straight b subscript straight n] cu raţia q, [open vertical bar q close vertical bar]≠1.: [open curly brackets straight S subscript straight n equals b subscript 1 times fraction numerator 1 minus q to the power of n over denominator 1 minus q end fraction comma space open vertical bar q close vertical bar less than 1 straight S subscript straight n equals b subscript 1 times fraction numerator q to the power of n minus 1 over denominator q minus 1 end fraction comma space open vertical bar q close vertical bar greater than 1 close curly brackets]; [open curly brackets straight S subscript straight n equals b subscript 1 times fraction numerator 1 minus q to the power of n plus 1 end exponent over denominator 1 minus q end fraction comma space q element of open parentheses 0 comma 1 close parentheses straight S subscript straight n equals b subscript 1 times fraction numerator q to the power of n plus 1 end exponent minus 1 over denominator q minus 1 end fraction comma space q element of open parentheses 1 comma infinity close parentheses close curly brackets]; [open curly brackets straight S subscript straight n equals b subscript 1 times fraction numerator 1 minus q to the power of n minus 1 end exponent over denominator 1 minus q end fraction comma space q element of open parentheses 0 comma 1 close parentheses straight S subscript straight n equals b subscript 1 times fraction numerator q to the power of n minus 1 end exponent minus 1 over denominator q minus 1 end fraction comma space q element of open parentheses 1 comma infinity close parentheses close curly brackets]
Right answer summary: [open curly brackets straight S subscript straight n equals b subscript 1 times fraction numerator 1 minus q to the power of n over denominator 1 minus q end fraction comma space open vertical bar q close vertical bar less than 1 straight S subscript straight n equals b subscript 1 times fraction numerator q to the power of n minus 1 over denominator q minus 1 end fraction comma space open vertical bar q close vertical bar greater than 1 close curly brackets]
Question state: todo