Question

The 8th term of a linear sequence is 18 and 12th term is 26.find the first term,common difference and 20th term

Answer 1

18 = a + d(8-1)
26 = a + d(12-1)

18 = a + 7 d
26 = a + 11d
------------- subtract
-8 = - 4 d
so
d = 2
now go back and get a from either equation

Answer 2

Correct

Answer 3

That's..... Awesome

Answer 4

Since wat d difference

Answer 5

Yeah 😊

Answer 6

Correct😍😍😍

Answer 7

What about the common difference

Answer 8

The first term of a linear sequence is 3 and the 8th term is 31 find the common difference

Answer 9

The first term of a linear sequence is 3 and the 8th term is 31. Find the common difference

Answer 10

Tn= a+(n-1)d.
8th term= a+(n-1)d.
8thterm= a+(8-1)d.
term (8)=a+7d.
But a= 3.
So, 3+7d=31.
7d=31-3=7d=28(divide both sides) d= 4.

Answer 11

Thank u

Answer 12

Good

Answer 13

I don't understand it

Answer 14

I don't understand how you solved it

Answer 15

What about the common difference

Answer 16

What about the common difference

Answer 17

Thanks , but what about the common difference

Answer 18

Thanks bye