Questions LLC
Login
or
Sign Up
Ask a New Question
Questions
Mathematics
what is the sum of the first twelve terms of an A.P, whose first term is 15 and the common different is 13.
1 answer
Recall the usual formula
S12 = 12/2 (2a+11d)
Now work your magic.
You can
ask a new question
or
answer this question
.
Related Questions
The sum of the first 20 terms of an arithmetic series is identical to the sum of the first 22 terms. If the common difference is
The sum of the first 10 terms of an arithmetic series is 145 and the sum of its fourth and ninth term is five times the third
The sum of the first 10 terms of an Ap is 145 and the sum of its fourth and ninth is 5 times the third term determine the first
A geometric series has three terms. The sum of the three terms is 42. The third term is 3.2 times the sum of the other two. What
A g.p has 8 terms.If the sum of first 4 terms is 45 and the sum of the last 4 term is 720, find the common ratio and the first
The first, third and ninth terms of a linear sequence are the first three terms of an exponential sequence. If the seventh term
The sum of the first five terms of a geometric series is 186 and the sum of the first six terms is 378. if the fourth term is
An exponential sequence of positive terms and a linear sequence have the same first term.the sum of their first terms is 3 the
The 14th term of an A.P is 96,while 25th term is 173 find the ,19th term,sum of 13th and 56th terms,product of 6th and 13th
Given that 1st term of an A.P is 7 and it's 10th term is twice the second term,calculate the (a) 19th term (b)sum of 28 terms