Math, asked by aarushigala12, 1 month ago

For an A.P., t1 = 7 & t12 = 29, find S12

Answers

Answered by raoclanleadr

0

Answer:

hshshshshshjdjdjdsjjs

Answered by Faizansabri

0

Step-by-step explanation:

t1=a=7
t12=29
a+(1-1)d=7
a=7
t12=a+(12-1)d
29=7+11d
11d=29-7
d=2
sn=n/2(2a+(n-1)d
s12=12/2(2×7+(12-1)2)
s12=6(14+11×2)
s12=6(14+22)
s12=6×36
s12=216

Previous Question

Next Question

Similar questions

Chemistry, 20 days ago

21. Polarizability of an anion----- a) Increase with decrease in size b) Increases with increase in size c) Decreases with increases in size d) Not affected by size...

Math, 20 days ago

if a =2 find the value of a+7+4(a-5)...

English, 20 days ago

factors contributing to girls education...

Science, 1 month ago

A device used to produce electric current is:...

Science, 1 month ago

These fibres are made from chemical substance which properties is these?

Social Sciences, 8 months ago

14. Himalayas and Karakoram provide boundary in the north.

Math, 8 months ago

{(1/3)^3} × (3/2)^2 ÷ {(2/3)^-1}^3...

Math, 8 months ago

Evaluate .Express as in rational number in its lowest form. (a). -3/7×5/6×-14/15 (b) 21/5×-4/9×-5/7...