16, The first term of an A.P. is 5, the common difference is 3 and the last term is 80; find the number of terms.
17. The 10th and 18th terms of an A.P. are 41 and 73 respectively. Find 26th term.
15. The sum of 4th and 8th terms of an A.P. is 24 and the sum of the 6th and 10th terms is 34. Find the first term and
the common difference of the A.P.
20. Solve: 125 + 22 + 19 + 16 + ... + x = 115 (ii) 1 + 4 + 7 + 10 + ... +x= 590.
21. Three numbers are ir A.P. If the sum of these numbers be 27 and the product 648, find the numbers.
ADDRESS: INVICTUS EDUCATION, NEAR WATER TANK, AWAS VIKAS COLONY, AURAIYA 206122
CONTACT: 09149334849, 7020711490
M.D.: S.S. Dwivedi(M.Sc./Phd.)
Page 1
18. If (m + 1)th term of an A.P. is twice the (n + 1)th term, prove that (3m + 1)th term is twice the (m +n + 1 th term.
Answers
Answered by
0
Answer:
16. Number of terms are 26
17. 26th term is 83.667
18. First term(a) is -0.5 and Common difference(d) is being 2.5
Similar questions