Question

in an arithmetic series the sum of first 14 terms is -203 and the sum of the next 11 term is -572 find the arithmetic series​

Answer 1

Answer:

hey Mark brainiest if helpful

Step-by-step explanation:

its given that ,

sum of 14 terms= -203

S14 = -203

14/2{2a+(14-1)d} = - 203 ...................(1)

and ,

sum of next 11 terms= -572

S25= -572

( because , it's given that next 11 terms so S14+11 = S25)

25/2{2a+(25-1)d}= -572....................(2)

so by solving equation (1) and (2)we get

14a +91d= -203 ..............(3)

25a + 300d = -572 ........(4)

solve the equation u will get the value of a and d .

then to find the arithmetic series put the value of a and d in ,

a , a+d,a+2d,a+3d,a+4d..........

I hope it helps you ....

I didn't solved it cuz I don't have enough time ,sorry bro/ sis .