Question

2y = 10 — y.
(111) The first term of an A.P. is – 5 and the 6th term is 45. Find S6.​

Answer 1

Answer:

a= -5

6th term is 45

so using a+(n-1)d

-5+(6-1)d=45

50=5d

d=10

so now let's find s6

Sn=n/2(2a+(n-1)d)

so S6=

6/2((2*-5)+5d)

3*(-10+5*10)

3*(-10+50)

3*40

120 is the ans

Step-by-step explanation:

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