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Quiz Discussion

Title: Geometric progression

Grade: 9-a Lesson: S4-L7

Explanation: Let us discuss a few questions on this topic and review the answers to every question.

Quiz: Discussion in Class

Problem Id	Problem	Options
Steps 1	Find the sum of the geometric series 2 + 6 + 18 + 54 + … where there are 6 terms in the series.	A) 728 B) 154 C) 486 D) 325
Steps 2	Find the sum of the geometric series 8 − 4 + 2 − 1 + … where there are 5 terms in the series	A) \$10/7\$ B) \$12/3\$ C) \$11/2\$ D) \$15/4\$
Steps 3	Find the sum of the geometric series –7 – 21 – 63 – … where there are 12 terms in the series	A) -160640 B) -180160 C) -120360 D) -1860040
Steps 4	Find the sum of the geometric series \$2,4/3,8/9,16/27,32/81,64/243\$	A) \$1330/243\$ B) \$3215/3025\$ C) \$5142/3125\$ D) \$3925/3120\$
Steps 5	Find the sum of the geometric series \$40,-20,10,-5,5/2,-5/4\$	A) \$105/4\$ B) \$127/4\$ C) \$101/4\$ D) \$129/4\$

Problem Id

Problem

Options

Steps 1

Find the sum of the geometric series 2 + 6 + 18 + 54 + … where there are 6 terms in the series.

A) 728

B) 154

C) 486

D) 325

Find the sum of the geometric series 8 − 4 + 2 − 1 + … where there are 5 terms in the series

A) \$10/7\$