Question

(a)
If the 6th term of an A.P. is equal to four times its first term and the sum of first six
terms is 75, find the first term and the common difference.
​

Answer 1

Step-by-step explanation:

6th term of an A.P.= a+5d

1st of an A.P.=a

A.T.Q:-

a+5d=4a

5d=3a

d=3a/5

A.T.Q:-

n/2[2a+(n-1)d]=75

6/2[2a+(6-1)3a/5]=75

3[2a+3a]=75

15a=75

a=5

d=3×5/5=3

So a=5 & d=3

Mark as brainliest, follow me and give thanks!!

Answer 2

here is ur answer in the given attachment!

hope it helps!

plz mark me as brainliest!