Get Help And Discuss STEM Concepts From Math To Data Science & Financial Literacy
STEM Gender Equality | Join us on ZOOM | Spreading Mathematical Happiness

MathsGee is free of annoying ads. We want to keep it like this. You can help with your DONATION

0 like 0 dislike
30 views

 

The first and second terms of an arithmetic sequence are 10 and 16 respectively.​ ​

  • Calculate the 11th term of the sequence
  • The sum of the first n terms of this sequence is -560. Calculate n.

 

in Grade 12 Maths by Diamond (50,454 points) | 30 views

1 Answer

0 like 0 dislike
d=16-10=6

a=10

T11= 10+(11-1)6

       = 70

 

-560=n(2(10)+(n-1)6)/2

    - 1120=n(6n-14)

      6n^2 -14n + 1120=0

  n= undefined
by Diamond (38,769 points)

No related questions found

Welcome to MathsGee Q&A Bank, Africa’s largest personalized STEM and Financial Literacy education network that helps people find answers to problems, connect with others and take action to improve their outcomes.


MathsGee Q&A is the STEM and Financial Literacy knowledge-sharing community where students and experts put their heads together to crack their toughest questions.


MathsGee is free of annoying ads. We want to keep it like this. You can help with your DONATION

Enter your email address:

11,440 questions
9,430 answers
100 comments
10,398 users