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

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 A.P. 18, 16, 14, 12,…. are needed to give the sum 78?

How many terms of the A.P. 1,4,7,... are needed to give the sum 925 ?

How many terms of the A.P. 1,4,7.... are needed to give the sum 715?

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

How many terms of the A.P. 54, 51, 48,……are needed to give the sum 513?

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