How many terms of the A.P. -6, `-(11)/2,\ -5ddot` are needed to give the sum -?

How many terms of the A.P. -6,-(11)/(2),-5… are needed to give the sum -25?

How many terms of the A.P.-6,-(11)/(2),-5 . are needed to give the sum-?

How many terms of the A.P.6,-(11)/(2),-5,... are needed to give the sum 25?

How many term of the A.P. 15 , 12, 9 ., - are needed to give the sum 15 ? Explain the duble answer .

How many terms of the A.P. 16,14,12……….. are needed to given the sum 60 ? Explain why do we get two answers.

How many terms of the AP 18,16,14,12 ,….. Are needed to given the sum 78 ? Explain the double answer.

How many terms are there in A.P

How many terms of the AP -15, -13, -11, … are needed to make the sum -55 ?

(i) How many terms of the G.P. 3,3^(2),3^(3) ……………. Are needed to give the sum 120? (ii) How many terms of a G.P 3, 3/2, 3/4 , ……… are needed to give the sum 3069/512 ?

How many terms of the AP 26,21,16,11,…. Ar needed to give the sum the sum 11 ?