Albete56viz
Answered

Find the first term of arithmetic sequence whose 26th term is – 43 and the

common difference is – 7.​

Sagot :

Elletn821viz

Answer:

132 is the first term

Step-by-step explanation:

let's use the formula for finding terms of arithmetic sequence.

a26=a1+(n-1)d a sub 26 is given so substitute

-43=a1+(26-1)(-7) let a sub 1 as is since it is missing

-43=a1+(25)(-7)

-43=a1-175

-43+175=a1

132=a1