Question

find the sum of an ap in wich d=7 and 22 term is 49​

Answer 1

Step-by-step explanation:

$d = 7 \\ 22 \: term \: is \: 149 \\ \\ general \: term \: of \: an \: ap \: is \: \\ a + (n - 1)d \\ \\ putting \: values \: we \: have$

$49 = a + (22 - 1)d \\ 49 = a + 21(7) \\ 149 = a + 147 \\ 149 - 147 = a \\ 2 = a \\ d = 7 \\ ap \: is \\ 2,9,16..........$

sum of 22 terms is:

n/2*(2a+(n-1)d)

22/2*(2*2+21*7)

11*(4+147)

1661

thank you!!!!

Answer 2

Answer:

hope hels u ....

refer to attachment