Question

Encontre a razão da PA
A)A1=5 A49=192
B)A49=192. A88=348

Answer 1

An=a1+(n-1)r

A)

192 = 5+(49-1).r

192 = 5 +48.r

192 - 5 = 48.r

187 = 48r

r = 187/48

B)

348 = 5 + (88-1).r

348 = 5 + 87.r

348 - 5= 87.r

343 = 87.r

r = 343/87