Question

find the first term and common difference of an AP whose 4th and 9th terms are -15 and-30​

Answer 1

Step-by-step explanation:

a=?

d=?

4th term= -15

9tn term= -30

we can write a+3d= -15 and a+8d= -30

from a+3d= -15

a= -15 - 3d......eq1

putting eq 1 in a+8d

so, -15 - 3d + 8d = -30

-15+5d = -30

5d = -30 +15

5d= -15

d= -3

put d= -3 in eq1

-15 -3d

-15 -3 ×-3

-15 + 9

a= +6

Answer 2

Answer:

hmmm aapki logic samajh mai nahi aai

aapne kaha ki i will not answer

haa

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