How many terms of the AP 24,21,18,…. Mus...

How many terms of the AP 24,21,18,…. Must be taken so that their sum is 78?

Verified by Experts

The correct Answer is:

n=4 or 13

Similar Questions

Explore conceptually related problems

How many terms of the A.P. : 24, 21, 18, ……… must be taken so that their sum is 78?

How many terms of the series 64+32+16+8+… must be taken so that the sum may be 127(1)/(2) ?

How many terms of the series 1+3+9+27+… must be taken so that the sum is 9841 ?

The number of terms of the A.P. 3,7,11,15… to be teken so that the sum is 406 is-

How many terms of the series {27+24+21+…} must be added to get the sum 132 ? Explain the double answer.

How many terms of the series {22+18+14+10+…} must be added to get the sum 64? Explain the double answer.

Which term of the AP: 21,18,15,…….. Is -81 ?

Which term of the AP: 3,8,13,18,……. Is 78?

How many terms of the series 54+51+48+45+ ... must be taken to make 513 ? Explain the double answer.

If the sum of first 2n terms of the A.P. 2, 5, 8,…. Is equal to the sum of the first n terms of the A.P. 57, 59, 61,… then find n.