English, asked by fnasheeda786, 8 months ago

the 20th term of an arithematic sequence is 64 and its 21th term is 70.can the difference between two terms46?why​

Answers

Answered by Anonymous
6

Answer:

They look like this, a, a+d, a+2d.. a + (n-1)d

6th and 11th are 20 and 30

The 6th term is a+5d while the 11th is a + 10d

a+10d = 30

a+5d = 20, subtract these two

5d = 10, d=2

Plug this d back in to get a+20=30, a = 10

A is the first term while d is the common difference so

the first term is 10 and the common difference is 2.

Explanation:

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