Math, asked by chandasingh0110, 8 months ago

sum of the third and seventh term of an ap is 6 and their product is 8 find the sum of first seven term of A. P

Answers

Answered by manan250

0

Answer:

Step-by-step explanation:

a3+a7=6

a+2d +a +6d =6

a+ 4d=3

also (a+2d)(a+6d)=8

thus solving we get d=1/2

a= 1

S7=7/2(2x1 + 6(1/2))

S7= 3.5x 5

S7=17.5

Previous Question

Next Question

Similar questions

Chemistry, 4 months ago

Q.H2 reacts with O2 as, 2H2 (g) +02(g) reacts to gives 2H2O (g) How much gas will remain if 2dm3 of hydrogen are reacted with 1 dm3 of O2 at S.TP a) Odm3 b) 1dm3 c) 2dm3 d) 3dm3 kindly Answer with Solution...

Math, 4 months ago

write each of the following numbers in words: 1).63,005 Answer:...

Social Sciences, 4 months ago

Find out about the anti-colonial movement in indo china Compare and contrast India's national movement with me ways in which indo china became independent...

Math, 8 months ago

What are dependant pair of equations?

Geography, 8 months ago

Give reason why smelting of iron ore essential ...

Math, 10 months ago

please solve this problem step by step ...

English, 10 months ago

he has become quite weak appropriate adverb...

Math, 10 months ago

how i can be good in calculus?