Question

Q.7a Find the middle term of the AP.
-11, -7, -3, ....., 45​

Answer 1

Answer:

Ur answer is in the above attachment

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Answer 2

Answer:

HERE

t1=-11

t2=-7

common difference (d)=t2-t1=-7-(-11)=4

tn=45

tn=a+(n-1)d

45 =-11+(n-1)4

= -11+4n-4

45+11+4=4n

59=4n

n= 14