Question

3. In the given series 19, 14, 9, ...... (-46).find:
a. 6th term from the end of the series
b. Find the number of terms in the series
c. Sum of the series.​

Answer 1

Answer:

a= -16

b= 14

c= -143

Step-by-step explanation:

1st term (a) = 19

difference (d) = -5

last term (tn) = -49

number of term (n) = ?

use formula

tn = a +(n-1)d to find no of series i.e 14

find 14-6 th term in question a

sum of series use formula ; Sn=n(2a+(n-1)d)/2