Question

find 31st term of. A.p. whose 11th. term is 38. and 16th term is 73? for. punjabi. midium​

Answer 1

here a11 = 38 and a16= 73

Answer 2

Answer:

175 is the answer.

Step-by-step explanation:

A11 = 39

a + 10d = 39 -----(1)

A16 = 73

a + 15d = 73 -----(2)

subtract eq (2) from eq (1)

a + 10d = 39

a + 15d = 73

(-) (-) (-)

----------------------

-5d = -34

d = 34/5

put d = 34/5 in eq (1)

a + 10(34/5) = 39

a + 68 = 39

a = 39 - 68

a = -29

a31 = a + 30d

= -29 + 30(34/5)

= -29 + 204

= 175