Question

Find S25 for 3 + 7 + 11 + 15 + …

Answer 1

Solve the following system of equations:

x − 2y = 14
x + 3y = 9

Answer 2

what even zahabaha

Answer 3

wat do u mean wat even??

Answer 4

7-3=4
11-7=4

so it is AS which common difference = 4

Sum of AS =(first term + last term)( no. of terms ) /2

So, we have to find out the last term

7=3+4
11=3+2(4)
15=3+3(4)
:
:
the 25th term = 3+24(4)=99

so
sum
= (3+99)(25)/2

Answer 5

THANK YOU <3 you're perfect.