Question

Find the missing term in the
geometric sequence.
13,[ ? ],208

Answer 1

110.5

Explanation:

208=13+(3-1)d

208=13+2d

-13. -13

195=2d

÷2. ÷2

97.5=d. (d means difference)

13(first term)+97.5=110.5

Answer 2

Answer: 676

Step-by-step explanation: r/13=208/r

r²=2704

r=52

13x52=676