aguzman aguzman

03-07-2015
Mathematics

contestada

the sum of the first 30 terms of the sequence an=6n+5 is

Respuesta :

kimeto3 kimeto3

03-07-2015

Sum= n(a₁+an)/2 where a₁ is the first term, and an is the nth term(30th for this)
an= 6n+5
a₁=6(1)+5
=11
a₃₀=6(30)+5
=185
Sum= 30(11+185)/2
=15(196)
=2940

Answer Link

Otras preguntas

What is the property, transformation, or simplification used in each step of this problem? x-7=34

HOW TO FIND THE MISSING NUMERATOR IN ANY FRACTIONS LIKE 4/8= ?/4

The discovery of gold in Transvaal contributed to the start of _____?the Anglo-Boer WarWorld War IIWorld War Ithe Peloponnesian War

If item costs $99.99 with 15% off and I get final price. It then asks me what percentage of savings. How do I get the percentage of savings

What is %15 of $35.15 What is %15 of $27.00

What is 9x^2-24x+ 16

sophia has 3 pink tulips and 3 white tulips. what fraction of sophias tulips are pink

There is a turtle race. The race will last 2 minutes. I have to find the distance from the start each turtle will be at the end of the race. Speed (in inches pe

How did New England's physical geography help the growth of industries?

If item costs $99.99 with 15% off and I get final price. It then asks me what percentage of savings. How do I get the percentage of savings