LilFreaky666
08.12.2019 •
Mathematics
What's the 4th term of the sequence defined by an=2a(n-1)+4; a1=7? ?
Solved
Show answers
More tips
- G Goods and services What Are the Most Popular Services?...
- O Other What is the oldest joke ever told?...
- L Legal consultation How to Properly Inherit: Tips and Recommendations...
- C Computers and Internet Boost your processor performance with these easy tips...
- S Sport How does Bodyflex work: what is it and how does it work?...
- H Health and Medicine How to Whiten Teeth and Get the Perfect Smile...
- S Style and Beauty How to Properly Apply Eye Makeup: Tips from a Professional Makeup Artist...
- A Auto and Moto How Can Parking Sensors Help Drivers?...
- C Computers and Internet Make Money Online: Secrets and Essential Ways...
- A Auto and Moto What is the Average Lifespan of an Engine in a Car?...
Answers on questions: Mathematics
- M Mathematics Please answer correctly...
- M Mathematics PLS HELP ME WITH THIS ASAP. Show the work too please, thank you....
- M Mathematics If an angel is double of its completement. find the angle....
- M Mathematics I need help with this...
- M Mathematics Austin borrowed $3000 from the bank at a rate of 2.25% simple interest per year. How much total did he have to pay back after 5 years?...
- M Mathematics Value of 5.3x10 4.2x10 scientific notation...
- M Mathematics Please I need this ASAP...
- M Mathematics I NEED HELP ASAP IT IS FOR CHRISTMAS If three kids that want to buy something that cost $35.99 how much would each of them have to pay? Any ideas for what i should get my mom...
- M Mathematics Two sides of a triangle have the following measures. Find the range of the third side. 7, 7,. Single choice. (1 Point) 0 x 7 7 x 14 0 x 14 7 x 0...
- M Mathematics A baseball card collector has six identical Mark McGwire cards and three identical Mike Schmidt cards. The collector s album has nine slots per page In how many distinguishable...
Ответ:
84
Step-by-step explanation:
The sequence is:
An=2a(n-1)+4
The first term is:
a1=7
So, lets find out A2.
A2 = 2A(2-1) +4
A2 = 2*A1 + 4
A2 = 2*7 + 4
A2 = 14 + 4 = 18
The third term, A3 is:
A3 = 2A(3-1) +4
A3 = 2*A2 + 4
A3 = 2*18 + 4 = 36+4 = 40
Finally, the fourth term, A4 is:
A4 = 2A(4-1) +4
A4 = 2*A3 + 4
A4 = 2*40 + 4 = 80+4 = 84
The 4th term is 84.
Ответ: