Question

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find the common difference anf number of terms​

Answer 1

Answer:

26 th term = 0

a + 25d = 0

= > a = - 25d

11th term = 3

= > a + 10d = 3

= > - 25d + 10d = 3

= > d = -1/5

a = 25/5 = 5

last term = -1/5

a + (n-1)d = -1/5

= > 5 - (n-1)/5 = -1/5

= > (n-1)/5 = 5+1/5 = 26/5

= > n-1 = 26

= > n=27

n = 27 and d = -1/5.

Answer 2

Solution ✌️✌️

now...

let ...first term=a

common difference= d

and last term=l

now....

given

a(26)=0

a(11)=3

now...

a(26)=a+(26-1)d

= >0=a+25d

=>a=-25d

now ...

a(11)=a+(11-1)d

=>3=a+10d

=>3=-25d+10d

= >-15d=3

=>d=(-1/5)

common difference is=-1/5