Question

calcule o décimo termo da pg

Answer 1

a1 = 1/4 = 
a2 = 1
a3 = 4
q = 1/1 : 1/4 = 1/1 * 4/1 = 4 ***
a10 = a1q⁹ =  1/4 * 4⁹  1/4 * 262144  = 262144/4 =65536 ***

S10 =  1/4 ( 4^10   - 1 )/ ( 4 - 1) = 1/4( 1048576 - 1)/3=
1/4. ( 1048575)/3 = 1/4 ( 349525) = 349525/4 ***