Which term of the progression `18 ,-12 ,8, ........`is`(512)/(729)?`

Which term of the progression 18 ,-12 ,8, i s(512)/(729)?

Which term of the progression 19 , 18 1/5, 17 2/5 , ......... is the first negative term ?

Find the 6th term of the progression 2, 6, 18,….

Find the 6th term of the progression 2, 6, 18,….

Which term of the progression 2, 8, 32,… is 131072 ?

Find the 40th term of the progression 3,8,13,18,……

Find the 41st term of the progression 3,8,13,18,… :

" Which term of the progression "19,18(1)/(5),17(2)/(5)," ,......is the first negative term? "

(a) Which term of the progression 4 + 8 + 12 + ... is 76 ? (b) Which term of the progression 36 + 33 + 30 + ... is zero ? (c) Which term of the progression (3)/(4)+1+(5)/(4)+..." is "12?

(a) Which term of the progression 4 + 8 + 12 + ... is 76 ? (b) Which term of the progression 36 + 33 + 30 + ... is zero ? (c) Which term of the progression (3)/(4)+1+(5)/(4)+..." is "12?